Use Cases as views: A formal approach to Requirements engineering in the Unified Process
J. Hendrik Hausmann, R. Heckel, in: Proceedings of the GI/OCG-Jahrestagung on Wirtschaft Und Wissenschaft in Der Network Economy - Visionen Und Wirklichkeit (2001), Wien (Österreich), Österreichische Computer Gesellschaft, Wien (Österreich), 2001, pp. 595–599.

Open Petri Nets as Semantic Model for Business Process Integration
R. Heckel, in: Proceedings of the 2nd International Colloquium on Petri Net Technologies for Modelling Communication Based Systems, DFG Research Group “Petri Net Technology,” 2001, pp. 129–134.

Strengthening UML Collaboration Diagrams by State Transformations
R. Heckel, S. Sauer, in: Proceedings of the 4th International Conference on Fundamental Approaches to Software Engineering (FASE 2001), Genova (Italy), Springer, London, UK, 2001, pp. 109–123.

Towards Behavior Consistent Modeling in UML-RT
J. Küster, in: Proceedings of the Forum on Design Languages (FDL’01), Lyon, France, 2001.

UML-based Behavior Specification of Interactive Multimedia Applications
S. Sauer, G. Engels, in: Proceedings of the IEEE Symposia on Human Centric Computing Languages and Environments (HCC 2001), Stresa (Italy), IEEE Computer Society, Washington, DC, USA, 2001, pp. 248–255.

How to Specify a Graph Transformation Approach - A Meta Model for Fujaba
R. Heckel, A. Zündorf, in: H. Ehrig, J. Padberg (Eds.), Proceeding of the Workshop on Uniform Approaches to Graphical Process Specifcation Techniques (UNIGRA 2001, Satellite Event of the ETAPS 2001), Elsevier, Genova (Italy), 2001, pp. 41–51.

On the Specification and Analysis of Protocols in UML-RT
G. Engels, J. Küster, L. Groenewegen, On the Specification and Analysis of Protocols in UML-RT, University of Paderborn, Department of Computer Science, 2001.

Cooperability in Train Control Systems: Specification of Scenarios using Open Nets
J. Padberg, L. Jansen, H. Ehrig, E. Schnieder, R. Heckel, Transactions of the Society for Design and Process Science 5 (2001) 3–21.

Double Pullback Transitions and Coalgebraic Loose Semantics for Graph Transformation Systems
R. Heckel, H. Ehrig, U. Wolter, A. Corradini, Applied Categorical Structures 9 (2001) 83–110.

Roles in Agent-Oriented Modeling
R. Depke, R. Heckel, J. Küster, International Journal of Software Engineering and Knowledge Engineering 11 (2001) 281–302.

A Coalgebraic presentation of structured transition systems
A. Corradini, M. Große-Rhode, R. Heckel, Theoretical Computer Science 260 (2001) 27–55.

Modelle für automobile Software - Objektorientierte Modellierung von eingebetteten, interaktiven Softwaresystemen im Automobil
G. Engels, J. Gaulke, S. Sauer, Forschungsforum Paderborn 4 (2001) 24–29.

Using an XML-capable mailtool for the communication in software development projects
M. Lohmann, A. Wagner, in: Proceedings of the Workshop on XML Technologies and Software Engineering (XSE; Satellite Event of the ICSE 2001), Toronto (Canada), 2001.

Using UML models for the Description of Concurrent Behavior in Component Interfaces
T. Schattkowsky, K. Mehner, R. Depke, in: Proceedings of the Workshop on Concurrency Issues of the UML (Satellite Event of the International Conference on the Unified Modeling Language - UML 2001), Toronto (Canada), 2001.

Agent-oriented Modeling with Graph Transformation
R. Depke, R. Heckel, J. Küster, in: Proceedings of the First International Workshop on Agent-Oriented Software Engineering (AOSE 2000), Limerick (Ireland), Springer, Berlin/Heidelberg, 2001, pp. 105–120.

"Separation of Concern" mit Rollen, Subjekten und Aspekten
R. Depke, K. Mehner, in: Proceedings of the Workshop on Aspektorientierung - Workshop Der GI-Fachgruppe 2.1.9 Objektorientierte Software-Entwicklung (2001), Paderborn (Germany), Universität Paderborn, 2001, pp. 1–7.

Enhancing UML-RT Concepts for Behavioral Consistent Architecture Models
G. Engels, J. Küster, in: Proceedings of the 1st Workshop on Describing Software Architecture with UML (Satellite Event of the ICSE 2001), Toronto (Canada), 2001.

Identifiying Semantic Dimensions of (UML) Sequence Diagrams
J. Hendrik Hausmann, J. Küster, S. Sauer, in: Proceedings of the Workshop on Practical UML-Based Rigorous Development Methods - Countering or Integrating the EXtremists (PUML, Colocated with the UML 2001), Toronto (Canada), Gesellschaft für Informatik (GI), Bonn, 2001, pp. 142–157.

Behavioral Constraints for Visual Models
R. Heckel, J. Küster, in: Proceeding of the Workshop on Graph Transformation and Visual Modelling Techniques (GT-VMT 2001, Satellite Event of the ICALP 2001), Heraklion (Greece), Elsevier, 2001.

Visualization and Debugging of Concurrent Java Programs with UML
K. Mehner, B. Weymann, in: Proceedings of the Workshop on Software Visualization (Satellite Event of the International Conference on Software Engineering - ICSE 2001), Toronto (Canada), 2001.

Special Issue: Selected Papers of GRATRA 2000
H. Ehrig, G. Engels, H.-J. Kreowksi, G. Taentzer, eds., Special Issue: Selected Papers of GRATRA 2000, Elsevier, Amsterdam, The Netherlands, 2000.

Workshop on Graph Transformation and Visual Modeling Techniques (ICALP 2000, Geneva, Switzerland)
J.D.P. Rolim, A.Z. Broder, A. Corradini, R. Gorrieri, R. Heckel, J. Hromkovic, U. Vaccaro, J.B. Wells, eds., Workshop on Graph Transformation and Visual Modeling Techniques (ICALP 2000, Geneva, Switzerland), Carleton Scientific, Waterloo, Ontario, Canada, 2000.

Konzeption eines XML-fähigen Mailtools
M. Lohmann, A. Wagner, in: Proceedings of Net.Object Days 2000, Erfurt (Germany), 2000.

Entwicklung eines Übersetzers von Nachrichtenaustauschformaten für Bankselbstbedienungssysteme in XML-Formate
S. Thöne, in: Proceedings of the Informatiktage 2000, Bad Schussenried (Germany), Konradin-Verlag, Leinfelden - Echterdingen, 2000.

A Model of a Physician’s Decision-Making Process using Electropunctural Methods of Diagnostics
A. Cherchago, N. Alexandrova, in: Proceedings of the All-Russia Students, Young Scientists and Specialists Scientific and Technical Conference on Biotechnical, Medical and Environmental Systems and Complexes (Ryazan, Russia), 2000.

Ein Konzept zur Generierung von XSL-Transformationen und dessen Anwendung bei Bankselbstbedienungssystemen
R. Depke, M. Langham, B. Lütkemeier, S. Thöne, in: Proceedings of the Net.ObjectDays (2000), Erfurt (Germany), 2000.

Graph Transformation as a Conceptual and Formal Framework for System Modeling and Model Evolution
G. Engels, R. Heckel, in: Proceedings of the 27th International Colloquium on Automata, Languages and Programming (ICALP 2000), Geneva (Switzerland), Springer, Berlin/Heidelberg, 2000, pp. 127–150.

UML - A Universal Modeling Language?
G. Engels, R. Heckel, S. Sauer, in: Proceedings of the 21st International Conference on Application and Theory of Petri Nets (ICATPN 2000), Aarhus (Denmark), Springer, Berlin/Heidelberg, 2000, pp. 24–38.

Object-Oriented Modeling - A Roadmap
G. Engels, L. Groenewegen, in: Proceedings of the Conference on The Future of Software Engineering - Special Track at 22nd International Conference on Software Engineering (ICSE 2000), Limerick (Ireland), ACM Press, New York, NY, USA, 2000, pp. 103–116.

Dynamic Meta-Modeling: A Graphical Approach to the Operational Semantics of Behavioral Diagrams in UML
G. Engels, J. Hendrik Hausmann, R. Heckel, S. Sauer, in: Proceedings of the 3rd International Conference on the Unified Modeling Language (UML 2000), York (UK), Springer, Berlin/Heidelberg, 2000, pp. 323–337.

Graphtransitionsregeln zur Beschreibung der Semantik von UML
J. Hendrik Hausmann, in: Proceedings of the Informatiktage 2000, Bad Schussenried (Germany), Konradin Verlag, Leinfelden - Echterdingen, 2000, pp. 103–107.

Visualizing the Synchronization of Java-Threads with UML
K. Mehner, A. Wagner, in: Proceedings of the IEEE International Symposium on Visual Languages (VL 2000), Seattle (Washington), IEEE Computer Society, Washington, DC, USA, 2000, pp. 199–206.

Integrating visual modeling of agent-based and object-oriented systems
R. Depke, R. Heckel, J. Küster, in: Proceedings of the Conference on Autonomous Agents (AGENTS 2000), Barcelona (Spain), ACM Press, New York, NY, USA, 2000, pp. 82–83.

On the Integration of Roles in the UML
R. Depke, G. Engels, J. Küster, On the Integration of Roles in the UML, University of Paderborn, Department of Computer Science, 2000.

Modeling Agent-Based Systems with Graph Transformation
R. Depke, R. Heckel, J. Küster, Modeling Agent-Based Systems with Graph Transformation, University of Paderborn, Department of Computer Science, 2000.

On the Concurrent Semantics of Open Graph Transformation Systems and Views
R. Heckel, M. Llabrés, H. Ehrig, F. Orejas, On the Concurrent Semantics of Open Graph Transformation Systems and Views, 2000.

Ablaufvisualisierung für nebenläufige Java-Programme mit UML Interaktionsdiagrammen
K. Mehner, A. Wagner, Ablaufvisualisierung Für Nebenläufige Java-Programme Mit UML Interaktionsdiagrammen, University of Saarbrücken, 2000.

Ein Konzept zur anwendungsbezogenen UML-Semantikbeschreibung durch dynamische Metamodellierung
J. Hendrik Hausmann, R. Heckel, S. Sauer, in: Proceedings of the Workshop Des Arbeitskreises GROOM Der GI Fachgruppe 2.1.9 Objektorientierte Software-Entwicklung on Visuelle Verhaltensmodellierung Verteilter Und Nebenläufiger Software-Systeme, Münster (Germany), 2000.

Modeling Agent-Based Systems with Graph Transformation and UML: From Requirement Specifcation to Object-Oriented Design
R. Depke, R. Heckel, J. Küster, in: Proceedings of the Workshop on Graph Transformation Systems (GraTra 2000), Berlin (Germany), Berlin, Germany, 2000.

Concurrency of Double-Pullback Graph Transitions
R. Heckel, M. Llabrés, H. Ehrig, F. Orejas, in: Proceedings of Workshop on Graph Transformation Systems (GraTra; Satellite Event of the ETAPS 2000), Berlin (Germany), 2000.

A Framework for Adding Packages to Graph Transformation Approaches
G. Busatto, G. Engels, K. Mehner, A. Wagner, in: Selected Papers of the 6th International Workshop on Theory and Application of Graph Transformations (TAGT ’98), Paderborn (Germany), Springer, Berlin/Heidelberg, 2000, pp. 352–367.

Graphical Operational Semantics
A. Corradini, R. Heckel, U. Montanari, in: Proceedings of the Workshop on Graph Transformation and Visual Modelling Techniques (Satellite Event of the ICALP 2000), Geneva (Switzerland), Carleton Scientific, 2000, pp. 411–418.

Towards Role-based Modeling of Autonomous Agents
R. Depke, R. Heckel, in: Proceedings of the Workshop Des Arbeitskreises GROOM Der GI Fachgruppe 2.1.9 Objektorientierte Software-Entwicklung on Visuelle Verhaltensmodellierung Verteilter Und Nebenläufiger Software-Systeme, Münster (Germany), 2000.

Requirement Specification and Design of Agent-Based Systems with Graph Transformation, Roles and UML
R. Depke, R. Heckel, J. Küster, in: Proceedings of the 1st International Workshop on Agent-Oriented Software Engineering (Satellite Event of the ICSE 2000), Limerick (Ireland), University of Limerick, Limerick, Ireland, 2000.

Deploying Agents in an Electronic Banking Environment
R. Depke, R. Heckel, J. Küster, in: Proceedings of the Workshop on Agents in Industry (Agents 2000; Satellite Event of the 4th International Conference on Autonomous Agents), Barcelona (Spain), 2000.

Rollenbasierte Modellierung autonomer Agenten
R. Depke, R. Heckel, J. Küster, in: Proceedings of the Workshop Des Arbeitskreises GROOM Der GI Fachgruppe 2.1.9 Objektorientierte Software-Entwicklung on Visuelle Verhaltensmodellierung Verteilter Und Nebenläufiger Software-Systeme, Münster (Germany), Universität Münster, Münster, 2000.

Formalizing the Development of Agent-Based Systems Using Graph Processes
R. Depke, R. Heckel, in: Proceedings of the Workshop on Graph Transformation and Visual Modelling Techniques (Satellite Event of the ICALP 2000), Geneva (Switzerland), Carleton Scientific, 2000, pp. 419–426.

From Trees to Graphs: Defining the Semantics of Diagram Languages with Graph Transformation
G. Engels, R. Heckel, in: Proceedings of the Workshop on Graph Transformation and Visual Modeling Techniques (Satellite Events of the ICALP 2000), Geneva(Switzerland), Carleton Scientific, 2000, pp. 373–382.

Modeling Concurrent Behavior through Consistent Statechart Views
G. Engels, J. Küster, L. Groenewegen, in: Proceedings of the Workshop on Dynamic Behaviour in UML Models: Semantic Questions, Munich (Germany), Ludwig-Maximilians-University, Munich (Germany), 2000, pp. 44–49.

Graph Transformation and Visual Modeling Techniques
G. Engels, R. Heckel, Bulletin of the EATCS (2000) 186–202.

Graph Transformation and Visual Modeling Techniques: Workshop Summary and HowTo
A. Corradini, R. Heckel, Bulletin of the EATCS (2000) 69–76.

Agenten im Auftrag des Bankkunden
R. Depke, R. Heckel, J. Küster, M. Langham, Geldinstitute 31 (2000) 32–33.

Multimedia in der wirtschaftswissenschaftlichen Lehre: Erfahrungsbericht
E.-E. Doberkat, Multimedia in Der Wirtschaftswissenschaftlichen Lehre: Erfahrungsbericht, LIT Verlag Münster, 2000.

Unterstützende Angebote der Softwarebegleitgruppe
G. Engels, U. Kelter, R. Depke, K. Mehner, in: Multimedia in Der Wirtschaftswissenschaftlichen Lehre, Erfahrungsbericht, LIT, Münster, 2000, pp. 27–56.

Ergebnisse - vergleichende Darstellung
G. Engels, R. Depke, K. Mehner, in: Multimedia in Der Wirtschaftswissenschaftlichen Lehre, Erfahrungsbericht, LIT, Münster, 2000, pp. 277–294.

Coordinated Collaboration of Objects
G. Engels, L. Groenewegen, G. Kappel, in: Proceedings of Advances in Object-Oriented Modeling, The MIT Press, 2000, pp. 307–332.

A Fully Abstract Model for Graph-Interpreted Temporal Logic
F. Gadducci, R. Heckel, M. Koch, in: Proceedings of the 6th International Workshop on Theory and Application of Graph Transformations (TAGT 1998), Paderborn (Germany), Springer, London, UK, 2000, pp. 310–322.

Formal Integration of Software Engineering Aspects Using Graph Rewrite Systems - A Typical Experience?!
G. Engels, A. Zamperoni, in: Proceedings of the International Workshop on Applications of Graph Transformations with Industrial Relevance (AGTIVE 1999), Kerkrade (The Netherlands), Springer, Berlin/Heidelberg, 2000, pp. 359–368.

Dynamische Metamodellierung als Methode zur Definition einer operationalen Semantik für die UML
R. Heckel, S. Sauer, in: Proceedings of the 7th GI-Workshop GROOM, University of Koblenz-Landau, 2000, pp. 43–44.

Strengthening the Semantics of UML Collaboration Diagrams
R. Heckel, S. Sauer, in: Proceedings of the Workshop on Dynamic Behaviour in UML Models: Semantic Questions, Munich (Germany), Ludwig-Maximilians-University, Munich (Germany), 2000, pp. 63–69.

Towards Consistency of Dynamic Models and Analysis of Timing Constraints
J. Küster, J. Stroop, in: Proceedings of 1st Workshop on Formal Design Techniques for Real-Time Systems (Satellite Event of the UML 2000), York (UK), University of York, York, UK, 2000.

Methodische Aspekte von Modellierungssprachen für nebenläufige Software
K. Mehner, T. Schattkowsky, in: Proceedings of the 8th GROOM Workshop: Visuelle Verhaltensmodellierung Verteilter Und Nebenläufiger Softwaresysteme (VVVNS 2000), Münster (Germany), Universität Münster, 2000, pp. 14–18.

Visualisierung der Synchronisation von Java-Threads mit UML
K. Mehner, A. Wagner, in: Proceedings of the Workshop on Modelle Und Modellierungssprachen in Informatik Und Wirtschaftsinformatik (Modellierung 2000), St. Goar (Germany), Fölbach, 2000.

Informatik : Informatik überwindet Grenzen. Tagungsband der 29. Jahrestagung der Gesellschaft für Informatik, Paderborn (Germany)
G. Engels, K. Beiersdörfer, W. Schäfer, eds., Informatik ’99: Informatik Überwindet Grenzen. Tagungsband Der 29. Jahrestagung Der Gesellschaft Für Informatik, Paderborn (Germany), Springer, Berlin/Heidelberg, 1999.

Patterns as a Means for Intelligent Software Engineering
D. Deugo, J. Küster, F. Oppacher, I. von Otte, in: Proceedings of the Conference on Artificial Intelligence (IC-AI 1999) Las Vegas, Nevada (USA), CSREA Press, 1999, pp. 605–611.

Tile Transition Systems as Structured Coalgebras
A. Corradini, R. Heckel, U. Montanari, in: Proceedings of the 12th International Symposium on Fundamentals of Computation Theory (FCT ’99), Springer, Berlin/Heidelberg, 1999, pp. 13–38.

Application of the Structured Analysis and Design Technique (SADT) Methodology for the Medical Information Systems Development
A. Cherchago, in: Proceedings of the All-Russia Students’, Young Scientists’ and Specialists’ Scientific and Technical Conference “New Information Technologies in Scientific Researches and in Education” (Ryazan, Russia), 1999.

Konzeption und objektorientierte Realisierung einer internet-basierten Datenbankanwendung
G. Engels, R. Depke, C. Borowski, in: Kolloquium Software-Entwicklung - Methoden, Werkzeuge, Erfahrungen, Technische Akademie Esslingen, Ostfildern, 1999, pp. 531–540.

UML Collaboration Diagrams and Their Transformation to Java
G. Engels, R. Hücking, S. Sauer, A. Wagner, in: Proceddings of The Unified Modeling Language: Beyond the Standard, Second International Conference (UML 99), Fort Collins, Colorado, USA, Springer, Berlin/Heidelberg, 1999, pp. 473–488.

A Bi-Categorical Axiomatisation of Concurrent Graph Rewriting
F. Gadducci, R. Heckel, M. Llabrés, in: Proceedings of the 8th Conference on Category Theory and Computer Science (CTCS 1999), Edinburgh (UK), Elsevier, 1999, pp. 80–100.

Modeling Agent-Based Systems with Graph Transformation and UML
R. Heckel, in: Proceedings of the Dagstuhl-Seminar 99451 on Rigorous Analysis and Design for Software Intensive Systems, 1999.

Extending UML for Modeling of Multimedia Applications
S. Sauer, G. Engels, in: Proceedings of the IEEE Symposium on Visual Languages (VL 1999), Tokyo (Japan), IEEE Computer Society, Tokyo, Japan, 1999, pp. 80–87.

Basic Properties of Double Pullback Graph Transitions
H. Ehrig, R. Heckel, M. Llabrés, F. Orejas, Basic Properties of Double Pullback Graph Transitions, Technical University of Berlin, 1999.

UML Collaboration Diagrams and Their Transformation to Java
G. Engels, R. Hücking, S. Sauer, A. Wagner, UML Collaboration Diagrams and Their Transformation to Java, University of Paderborn, Department of Computer Science, 1999.

SOCCA Extended with UML like Packages
G. Engels, P. Jan t’Hoen, R. Dassen, L. Groenewegen, I. G. Sprinkhuizen-Kuyper, P. Koopman, SOCCA Extended with UML like Packages, Leiden Institute of Advanced Computer Science, 1999.

A Formalisation of SOCCA using Z, part 1: The Type Level Concepts
G. Engels, R. Dassen, L. Groenewegen, I. G. Sprinkhuizen-Kuyper, P. Koopman, P. Jan t’Hoen, A Formalisation of SOCCA Using Z, Part 1: The Type Level Concepts, Leiden Institute of Advanced Computer Science, 1999.

UML-basierte Modellierung von Multimediaanwendungen
S. Sauer, G. Engels, in: Modellierung 1999, Workshop Der Gesellschaft Für Informatik e. V. (GI), März 1999 in Karlsruhe, Teubner, Stuttgart, Karlsruhe, Germany, 1999, pp. 155–170.

OMMMA: An Object-Oriented Approach for Modeling Multimedia Information Systems
S. Sauer, G. Engels, in: Proceedings of the Workshop on Multimedia Information Systems (MIS 1999), Indian Wells, CA (USA), Indian Wells, California, USA, 1999, pp. 64–71.

An Algebra of Graph Derivations using Finite (co-) limit Double Theories
A. Corradini, M. Große-Rhode, R. Heckel, in: Selected Papers of the 13th International Workshop on Recent Trends in Algebraic Development Techniques (WADT 1998), Lisbon (Portugal), Springer, Berlin/Heidelberg, 1999, pp. 92–106.

From SOS Specifications to Structured Coalgebras: How to Make Bisimulation a Congruence
A. Corradini, R. Heckel, U. Montanari, in: Proceedings of the 2nd Workshop on Coalgebraic Methods in Computer Science (CMCS 99), Elsevier, Amsterdam, The Netherlands, 1999, pp. 118–141.

Dynamic Meta Modelling: A Graphical Approach to Operational Semantics
G. Engels, R. Heckel, S. Sauer, in: Proceedings of the Workshop on Rigorous Modeling and Analysis with the UML: Challenges and Limitations (Satellite Event of the Conference on Onject-Oriented Programming, Systems, Languages, and Applications (OOPSLA 1999)), Denver, CO (USA), 1999.

MVC-Based Modeling Support for Embedded Real-Time Systems
G. Engels, S. Sauer, in: Proceedings of OMER Workshop, Herrsching, Germany, Herrsching, Universität der Bundeswehr München, Fakultät für Informatik, 1999, pp. 11–14.

An Assessment of Aspect Language Design
K. Mehner, A. Wagner, in: Proceedings of the Young Researchers Workshop (Satellite Event of the Generative and Component-Based Software Engineering (GCSE 1999)), Erfurt (Germany), 1999.

On the Role of Method Families in Aspect Oriented Programming
K. Mehner, A. Wagner, in: Proceedings of the ECOOP Workshop on Aspect Oriented Programming, Lisboa (Spain), Springer, Berlin/Heidelberg, 1999, pp. 305–306.

Ein Vorgehensmodell für die Multimedia-Entwicklung mit Autorensystemen
R. Depke, G. Engels, K. Mehner, S. Sauer, A. Wagner, Informatik Forschung Und Entwicklung 14 (1999) 83–94.

Formalization of the development process for a software-hardware reflexodiagnostic tool
A. Cherchago, V. Finaev, Scientific Bulletin of Academy of Information Technologies in Education, Science and Balneology 3 (1999).

Graph Transformation for Specification and Programming
M. Andries, G. Engels, A. Habel, B. Hoffmann, H.-J. Kreowski, S. Kuske, D. Plump, A. Schürr, G. Taentzer, Science of Computer Programming 34 (1999) 1–54.

Handbook of Graph Grammars and Computing by Graph Transformation: Vol. 2: Applications, Languages, and Tools
H. Ehrig, G. Engels, H.J. Kreowski, G. Rozenberg, Handbook of Graph Grammars and Computing by Graph Transformation: Vol. 2: Applications, Languages, and Tools, World Scientific Publishing Co., Inc., River Edge, NJ, USA, 1999.

A View-based Approach to System Modeling Based on Open Graph Transformation Systems
R. Heckel, G. Engels, H. Ehrig, G. Taentzer, in: Handbook of Graph Grammars and Computing by Graph Transformations, Volume 2: Applications, Languages and Tools, World Scientific, Singapore, 1999, pp. 639–668.

Classification and Comparison of Module Concepts for Graph Transformation Systems
R. Heckel, G. Engels, H. Ehrig, G. Taentzer, in: Handbook of Graph Grammars and Computing by Graph Transformations, Volume 2: Applications, Languages and Tools, World Scientific, Singapore, 1999, pp. 669–689.

Semi-Formal and Formal Specification Techniques
G. Engels, H. Ehrig, F. Orejas, M. Wirsing, eds., Semi-Formal and Formal Specification Techniques, Schloss Dagstuhl, Leibniz Center for Informatics, 1998.

6th International Workshop on Theory and Applications of Graph Transformations (TAGT ), Paderborn, Selected Papers
G. Engels, H. Ehrig, H.-J. Kreowski, G. Rozenberg, eds., 6th International Workshop on Theory and Applications of Graph Transformations (TAGT ’98), Paderborn, Selected Papers, Springer, Berlin/Heidelberg, 1998.

Ein Ansatz zur Verbesserung des Entwicklungsprozesses von Multimedia-Anwendungen
R. Depke, G. Engels, K. Mehner, S. Sauer, A. Wagner, in: Proceedings of the GI-Fachtagung on Softwaretechnik (1998), Paderborn (Germany), GI, 1998, pp. 12–19.

Integration of Single Pushout Transformation and Functional Programming
K. Didrich, A. Wagner, in: Proceedings of the World Conference on Integrated Design and Process Technology (IDPT 1998), Berlin (Germany), Society for Design and Process Science, 1998, pp. 65–73.

A generalized schema of a decision-making process of a SCENAR-therapeutist
A. Cherchago, in: Proceedings of the Scientific and Technical Conference on Medical Information Systems (MIS 1998), Taganrog (Russia), 1998.

Compositional Verification of Reactive Systems Specified by Graph Transformation
R. Heckel, in: Proceedgins of the First International Conference on Fundamental Approaches to Software Engineering (FASE 1998), Lisbon (Portugal), Springer, Berlin/Heidelberg, 1998, pp. 138–153.

Interoperability in Train Control Systems: Specification of Scenarios Using Open Nets
J. Padberg, L. Jansen, R. Heckel, H. Ehrig, in: Proceedings of the Conference on Integrated Design and Process Technology (IDPT 1998), Berlin (Germany), Society for Design and Process Science, 1998, pp. 17–28.

Electronic Commerce Systeme als Anwendungsbeispiel für Evolutionstechniken
G. Engels, S. Kolmschlag, Electronic Commerce Systeme Als Anwendungsbeispiel Für Evolutionstechniken, University of Paderborn, C-LAB, 1998.

Unterstützung der Flexibilität eines Electronic Commerce Systems durch Evolutionstechniken
S. Kolmschlag, G. Engels, in: Proceedings of the Workshop on “Integration Heterogener Softwaresysteme” (Satellite Event of the GI-Jahrestagung Informatik 1998), Magdeburg (Germany), GI, 1998, pp. 13–24.

Structured Transition Systems as Lax Coalgebras
A. Corradini, M. Große-Rhode, R. Heckel, in: Proceedings of the First Workshop on Coalgebraic Methods in Computer Science (CMCS 1998), Lisbon (Portugal), Elsevier, 1998.