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.

Simple Modules for Grace
R. Heckel, B. Hoffmann, P. Knirsch, S. Kuske, in: Selected Papers of the 6th International Workshop on Theory and Application of Graph Transformation (TAGT 1998), Paderborn (Germany), Springer, Berlin/Heidelberg, 1998, pp. 215–224.

Graph Transformation and Other Rule-Based Formalisms with Incomplete Information
H. Ehrig, R. Heckel, J. Padberg, G. Rozenberg, in: Proceedings of the 6th International Workshop on Theory and Application of Graph Transformation (TAGT 1998), Paderborn (Germany), 1998.

Double-Pullback Graph Transitions: A Rule-Based Framework with Incomplete Information
H. Ehrig, R. Heckel, M. Llabrés, F. Orejas, J. Padberg, G. Rozenberg, in: Selected Papers from the 6th International Workshop on Theory and Application of Graph Transformations (TAGT 1998), Paderborn (Germany), Springer, Berlin/Heidelberg, 1998, pp. 85–102.

Classification and Comparison of Modularity Concepts for Graph Transformation Systems
H. Ehrig, G. Engels, R. Heckel, G. Taentzer, in: Pre-Proceedings of the 6th International Workshop on Theory and Application of Graph Transformation (TAGT ’98), Paderborn (Germany), University of Paderborn, 1998, pp. 122–131.

Model Checking Graph-Interpreted Temporal Formulas
F. Gadducci, R. Heckel, M. Koch, in: Proceedings of the 6th International Workshop on Theory and Application of Graph Transformation (TAGT 1998), Paderborn (Germany), Paderborn, 1998.

DPO Derivations via Disconnected Rules
F. Gadducci, R. Heckel, M. Llabrés, in: Proceedings of the 6th International Workshop on Theory and Application of Graph Transformation (TAGT 1998), Paderborn (Germany), 1998.

Event Processing in Mobile and Active Database Systems Using Broadcasts
S. Sauer, O. Zukunft, in: Proceedings of the 9th International Workshop on Database and Expert Systems Applications (DEXA 1998), Vienna (Austria), IEEE Computer Society, Washington, DC, USA, 1998, pp. 420–426.

Construction and Characterisation of Double-Pullback Graph Transitions
H. Ehrig, R. Heckel, M. Llabrés, F. Orejas, in: Proceedings of the 6th International Workshop on Theory and Application of Graph Transformation (TAGT 1998), Paderborn (Germany), 1998.

Open Graph Transformation Systems: A New Approach to the Compositional Modelling of Concurrent and Reactive Systems
R. Heckel, Open Graph Transformation Systems: A New Approach to the Compositional Modelling of Concurrent and Reactive Systems, 1998.

Themenheft: Softwaretechnik
G. Engels, ed., Themenheft: Softwaretechnik, Springer, Berlin/Heidelberg, 1997.

A View-Oriented Approach to System Modelling Using Graph Transformations
G. Engels, R. Heckel, G. Taentzer, H. Ehrig, in: M. Jazayeri, H. Schauer (Eds.), Proceedings European Software Engineering Conference (ESEC 1997), Zürich (Switzerland), Springer, Berlin/Heidelberg, 1997, pp. 327–343.

Thermooptische Effekte in Nd:YAG-Slablasern
R. Depke, S. Knoke, W. Schöne, A. Tünnermann, H. Welling, in: Verhandlungen Der Deutschen Physikalischen Gesellschaft, Physik-Verlag, Weinheim, Germany, 1997.

Integrating the Specification Techniques of Graph Transformation and Temporal Logic
R. Heckel, H. Ehrig, U. Wolter, A. Corradini, in: Proceedings of the 22nd International Symposium on Mathematical Foundations of Computer Science (MFCS 1997), Bratislava (Slovakia), Springer, London, UK, 1997, pp. 219–228.

Einfrequenzbetrieb von Nd:YAG-Stablasersystemen hoher Ausgangsleistung
S. Knoke, R. Depke, W. Schöne, O.S. Brozek, A. Tünnermann, H. Welling, in: Verhandlungen Der Deutschen Physikalischen Gesellschaft, Weinheim (Germany), Physik-Verlag, 1997.

Loose Semantics and Constraints for Graph Transformation Systems
R. Heckel, H. Ehrig, U. Wolter, A. Corradini, Loose Semantics and Constraints for Graph Transformation Systems, 1997.

A 2-Categorical Presentation of Distributed Graph Transformation
F. Gadducci, R. Heckel, in: Proceedings of the Workshop on the General Theory of Graph Transformation Systems (GETGRATS 1997), Bordeaux (France), Bordeaux, 1997.

Combining Graph Transformations with Temporal Logic
F. Gadducci, R. Heckel, M. Koch, in: Proceedings of the Workshop on the General Theory of Graph Transformation Systems (GETGRATS 1997), Bordeaux (France), Bordeaux, 1997.

An Inductive View of Graph Transformation
F. Gadducci, R. Heckel, in: Proceedings of the 12th International Workshop on Recent Trends in Algebraic Development Techniques (WADT 1997), Tarquinia (Italy), Springer, Berlin/Heidelberg, 1997, pp. 223–237.

Compositional Development and Verification of Graph Transformation Systems Based on Views and View Integration
R. Heckel, in: Proceedings of the Workshop on the General Theory of Graph Transformation Systems (GETGRATS 1997), Bordeaux (France), 1997.

Guest Editors' Introduction
G. Engels, H. Jürgen Schneider, International Journal on Software Engineering and Knowledge Engineering (IJSEKE) 7 (1997) 397–400.

A Combined Reference Model- and View-Based Approach to System Specification
G. Engels, R. Heckel, G. Taentzer, H. Ehrig, Int. Journal of Software and Knowledge Engeneering 7 (1997) 457–477.

Algebraic Approaches to Graph Transformation, Part II: Single Pushout Approach and Comparison with Double Pushout Approach
H. Ehrig, R. Heckel, M. Korff, M. Löwe, L. Ribeiro, A. Wagner, A. Corradini, in: Handbook of Graph Grammars and Computing by Graph Transformations, Volume 1: Foundations, World Scientific, Singapore, 1997, pp. 247–312.

How to represent a visual specification
G. Engels, J. Rekers, M. Andries, in: Visual Language Theory, Springer, Berlin/Heidelberg, 1997, pp. 241–255.

Algebraic Approaches to Graph Transformation, Part I: Basic Concepts and Double Pushout Approach
A. Corradini, U. Montanari, F. Rossi, H. Ehrig, R. Heckel, M. Löwe, in: Handbook of Graph Grammars and Computing by Graph Transformation, Volume 1: Foundations, World Scientific, Singapore, 1997, pp. 163–245.

Special Issue on Graph Transformations
G. Engels, H. Ehrig, G. Rozenberg, A. Skowron, eds., Special Issue on Graph Transformations, IOS Press, Amsterdam, 1996.

Synchronization of Views and Loose Semantics of Typed Graph Productions
H. Ehrig, R. Heckel, J. Padberg, G. Taentzer, U. Wolter, A. Corradini, G. Engels, in: Report on the Dagstuhl-Seminar 9637 on Graph Transformations in Computer Science, Technical University of Berlin, 1996, pp. 11–12.

Behavioral Constraints for Loose Graph Transformation Systems
R. Heckel, in: Report on the Dagstuhl-Seminar 9637 on Graph Transformations in Computer Science, Technical University of Berlin, 1996, pp. 12–13.

Industrial maintenance modelled in SOCCA: an experience report
T. de Bunje, G. Engels, L. Groenewegen, A. Matsinger, M. Rijnbeek, in: Proceedings of the Fourth International Conference on the Software Process (ICSP 1996), Brighton (UK), IEEE Computer Society, Washington, DC, USA, 1996, pp. 13–26.

A View-Based Approach to System Modelling
G. Engels, H. Ehrig, R. Heckel, G. Taentzer, A. Corradini, in: Report on Dagstuhl-Seminar 9637 on Graph Transformations in Computer Science, Technical University of Berlin, 1996, p. 11.

Object-oriented specification of coordinated collaboration
G. Engels, L. Groenewegen, G. Kappel, in: Proceedings of IFIP World Conference on IT Tools (1996), Canberra (Australia), Chapman &; Hall, 1996, pp. 437–452.

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, Graph Transformation for Specification and Programming, University of Bremen, Department of Mathematics and Computer Science, 1996.

Definition of an Encapsulated Hierarchical Graph Data Model: Static Aspects, Part 1.
G. Busatto, G. Engels, Definition of an Encapsulated Hierarchical Graph Data Model: Static Aspects, Part 1., Vakgroep Informatica, Rijksuniversiteit Leiden, 1996.

Object-oriented Specification of Coordinated Collaboration
G. Engels, L. Groenewegen, G. Kappel, Object-Oriented Specification of Coordinated Collaboration, Vakgroep Informatica, Rijksuniversiteit Leiden, 1996.

Horizontal and Vertical Structuring of Typed Graph Transformation Systems
R. Heckel, A. Corradini, H. Ehrig, M. Löwe, Horizontal and Vertical Structuring of Typed Graph Transformation Systems, 1996.

Towards Measurable Process Models
T. de Bunje, G. Engels, L. Groenewegen, M. Heus, A. Matsinger, in: Proceedings of the Workshop on Software Process Technology (EWSPT 1996), Nancy (France), Springer, Berlin/Heidelberg, 1996, pp. 183–187.

Pragmatic and Semantic Aspects of a Module Concept for Graph Transformation Systems
H. Ehrig, G. Engels, in: Selected Papers from the 5th International Workshop on Graph Gramars and Their Application to Computer Science, Williamsburg, VA (USA), Springer, Berlin/Heidelberg, 1996, pp. 137–154.

Comprehensive Support for Change: Generic, Multi-dimensional (Software) Engineering Frameworks (position paper)
G. Engels, A. Zamperoni, in: Proceedings of the Workshop on Requirements Engineering in a Changing World (Satellite Event of the Conference on Advanced Information Systems Engineering (CAISE 1996)), Crete (Greece), 1996, pp. 42–44.

Reuse of Software Process Fragments is Reuse of Software, too
L. Groenewegen, G. Engels, in: Proceedings of the 10th International Software Process Workshop (ISPW 1996), Ventron (France), IEEE Computer Society, Washington, DC, USA, 1996, p. 68.

Automatic Integration of Safety Invariants into Z Specifications
R. Heckel, M. Conrad, G. Egger, J. Hiemer, in: Proceedings of the Workshop on Tools for System Development and Verifcation, Shaker Verlag, Bremen, Germany, 1996, pp. 70–83.

Graph Grammars with Negative Application Conditions
A. Habel, R. Heckel, G. Taentzer, Fundamenta Informaticae 26 (1996) 287–313.

Horizontal and Vertical Structuring of Typed Graph Transformation Systems
R. Heckel, A. Corradini, H. Ehrig, M. Löwe, Mathematical Structures in Computer Science 6 (1996) 613–648.

A Hybrid Query Language for the Extended Entity Relationship Model
M. Andries, G. Engels, Journal of Visual Languages and Computing 7 (1996) 321–352.

Tight Integration on One Document: The Programming Environment
G. Engels, M. Nagl, W. Schäfer, B. Westfechtel, in: Building Tightly Integrated Software Development Environments: The IPSEN Approach, Springer, Berlin/Heidelberg, 1996, pp. 170–177.

Attributed Graph Transformations with Controlled Application of Rules
R. Heckel, J. Müller, G. Taentzer, A. Wagner, in: Proceedings of the Colloquium on Graph Transformation and Its Application in Computer Science, Universitat de les Illes Balears, 1995.

Record Linkage of Anonymous Data by Control Numbers
W. Thoben, H.-J. Appelrath, S. Sauer, in: Proceedings of the 18th Annual Conference of the Gesellschaft Für Klassifikation, Oldenburg (Germany), Springer, Berlin/Heidelberg, 1995, pp. 412–419.

Embedding of Conditional Graph Transformations
R. Heckel, in: Proceedings of the Colloquium on Graph Transformation and Its Application in Computer Science, Universitat de les Illes Balears, 1995.

Graphische Spezifikation ausgewählter Teile von AGG - einem algebraischen Graphgrammatiksystem
M. Conrad, M. Gajewsky, R. Holl-Biniasz, M. Rudolf, J. Demuth, S. Weber, R. Heckel, J. Müller, G. Taentzer, A. Wagner, Graphische Spezifikation Ausgewählter Teile von AGG - Einem Algebraischen Graphgrammatiksystem, 1995.

Specialization of Object Life Cycle Definitions
J. Ebert, G. Engels, Specialization of Object Life Cycle Definitions, University of Koblenz-Landau, Koblenz, 1995.

Encapsulated Hierarchical Graphs, Graph Types, and Meta Types
G. Engels, A. Schürr, Encapsulated Hierarchical Graphs, Graph Types, and Meta Types, Vakgroep Informatica, Rijksuniversiteit Leiden, 1995.

Coordination by Behavioural Views and Communication Patterns
L. Groenewegen, G. Engels, in: Proceedings of the 4th European Workshop on Software Process Technology (EWSPT 1995), Noordwijkerhout (The Netherlands), Springer, Berlin/Heidelberg, 1995, pp. 189–192.

A Compositional Approach to Structuring and Refinement of Typed Graph Grammars
A. Corradini, R. Heckel, in: Proceedings of the Joint COMPUGRAPH/SEMAGRAPH Workshop on Graph Rewriting and Computation (SEGRAGRA 1995), Volterra (Italy), Elsevier, 1995, pp. 46–55.

GRAPHIT: Graphical Support and Integration of Formal and Semiformal Methods for Software Specification and Development
B. Bardohl, R. Bardohl, P. Castro, H. Ehrig, R. Heckel, L. Ribeiro, D. Nunes, A. Martini, in: Proceedings of the 3rd German-Brazilian Workshop on Information Technology (1995), Berlin (Germany), Forschungszentrum Jülich GmbH, 1995.

Encapsulated Hierarchical Graphs, Graph Types, and Meta Types
G. Engels, A. Schürr, in: Proceedings of the Joint COMPUGRAPH/SEMAGRAPH Workshop on Graph Rewriting and Computation (SEGRAGRA 1995), Volterra (Italy), Elsevier, Amsterdam, The Netherlands, 1995, pp. 101–109.

Ensuring Consistency of Conditional Graph Grammars - A constructive Approach
R. Heckel, A. Wagner, in: Proceedings of the Joint COMPUGRAPH/SEMAGRAPH Workshop on Graph Rewriting and Computation (SEGRAGRA 1995), Volterra (Italy), Elsevier, 1995, pp. 118–126.

Fundamentals of Object-Oriented Languages, Systems, and Methods
H.-D. Ehrich, G. Engels, J. Paredaens, J. Wegner, eds., Fundamentals of Object-Oriented Languages, Systems, and Methods, Schloss Dagstuhl, Leibniz Center for Informatics, 1994.

Graph Gramars and Their Application to Computer Science, 5th International Workshop (1994), Selected Papers
J. Cuny, H. Ehrig, G. Engels, G. Rozenberg, eds., Graph Gramars and Their Application to Computer Science, 5th International Workshop (1994), Selected Papers, Springer, Berlin/Heidelberg, 1994.

Berücksichtigung von Datenschutzaspekten in einem bevölkerungsbezogenen Krebsregister
W. Thoben, H.-J. Appelrath, J. Rettig, S. Sauer, in: Proceedings of the Conference on Medizin Und Information, Biometrie Und Epidemiologie (GMDS 1994), Dresden (Germany), MMV Medizin Verlag, München, 1994, pp. 88–90.

Structural and Behavioural Views on OMT-Classes
J. Ebert, G. Engels, in: Proceedings of the International Symposium on Object-Oriented Methodologies and Systems (ISOOMS 1994), Palermo (Italy), Springer, Berlin/Heidelberg, 1994, pp. 142–157.

Object-Oriented System Development: Will the New Approach Solve Old Problems?
G. Engels, G. Kappel, in: Proceedings of the IFIP 13th World Computer Congress on Information Processing, Hamburg (Germany), Elsevier, 1994, pp. 434–441.

Towards a Module Concept for Graph Transformation Systems: The Software Engineering Perspective
G. Engels, H. Ehrig, in: Proceedings Colloquium on Graph Transformation and Its Application in Computer Science, Universitat de les Illes Balears, Departament de Ci, 1994.

Observable or Invocable Behaviour - You Have to Choose
J. Ebert, G. Engels, Observable or Invocable Behaviour - You Have to Choose, Vakgroep Informatica, Rijksuniversiteit Leiden, 1994.

Syntax and Semantics of Hybrid Database Languages
M. Andries, G. Engels, in: Proceedings of the International Workshop on Graph Transformations in Computer Science (1993), Dagstuhl (Germany), Springer, Berlin/Heidelberg, 1994, pp. 19–36.

Specification of coordinated behaviour by SOCCA
G. Engels, L. Groenewegen, in: Proceedings of the Third European Workshop on Software Process Technology (EWSPT 1994), Villard de Lans (France), Springer, Berlin/Heidelberg, 1994, pp. 128–151.

Visual Specification of Complex Database Actions
G. Engels, P. Löhr, in: Proceedings of the 2nd International East/West Database Workshop, Klagenfurt (Germany), Springer, Berlin/Heidelberg, 1994, pp. 303–314.

Visuelles Spezifizieren von komplexen Aktionen auf Datenbankstrukturen
P. Löhr-Richter, G. Engels, GI-Datenbank Rundbrief 13 (1994) 33–35.

Design Representation
J. Ebert, G. Engels, in: Encyclopedia of Software Engineering, John Wiley &; Sons, Inc., 1994, pp. 382–394.

SOCCA: Specifications of Coordinated and Cooperative Activities
G. Engels, L. Groenewegen, in: Software Process Modelling and Technology, Research Studies Press, Taunton, 1994, pp. 71–102.

Integrationsaspekte bei verteilter Software-Entwicklung
G. Engels, A.A. Verrijn-Stuart, in: Fortschritt-Berichte VDI, VDI Verlag, 1993, pp. 45–53.

A Hybrid Query Language for the Extended Entity Relationship Model
M. Andries, G. Engels, A Hybrid Query Language for the Extended Entity Relationship Model, Vakgroep Informatica, Rijksuniversiteit Leiden, 1993.

Towards a Module Concept for Graph Transformation Systems
H. Ehrig, G. Engels, Towards a Module Concept for Graph Transformation Systems, Vakgroep Informatica, Rijksuniversiteit Leiden, 1993.

Abstracts COMPUGRAPH II Workshop
G. Engels, G. Rozenberg, Abstracts COMPUGRAPH II Workshop, Vakgroep Informatica, Rijksuniversiteit Leiden, 1993.

Modular, Visual Specifications of Software Processes
G. Engels, L. Groenewegen, in: Proceedings of the Workshop on Software Process (ISPW 1993), Wadern (Germany), IEEE Computer Society, Washington, DC, USA, 1993, pp. 66–68.

Functional Description of Parallel Processes
P. Koopman, L. Groenewegen, G. Engels, in: Proceedings of the Conference SION Computing Science in the Netherlands (CSN ’92), The Netherlands, 1992, pp. 156–167.

Visual Specifications of Conceptual Database Schemata (Abstract)
G. Engels, Visual Specifications of Conceptual Database Schemata (Abstract), Leiden University, 1992.

CADDY: A Highly Integrated Environment to Support Conceptual Database Design
G. Engels, P. Löhr-Richter, in: Proceedings of the Fifth International Workshop on Computer-Aided Software Engineering (CASE 1992), Montreal (Canada), IEEE Computer Society, Washington, DC, USA, 1992, pp. 19–22.

Specification of Coordinated Behaviour in the Software Development Process
G. Engels, L. Groenewegen, in: Proceedings of the Second European Workshop on Software Process Technology (EWSPT 92), Trondheim, Norway, Springer, Berlin/Heidelberg, 1992, pp. 58–60.

SQL/EER - Syntax and Semantics of an Entity-Relationship-Based Query Language
U. Hohenstein, G. Engels, Information Systems 17 (1992) 209–242.

Building Integrated Software Development Environments, Part I: Tool Specification
G. Engels, C. Lewerentz, M. Nagl, W. Schäfer, A. Schürr, ACM Transactions on Software Engineering and Methodology (TOSEM) 1 (1992) 135–167.

Conceptual Modelling of Database Applications Using an Extended ER Model
G. Engels, M. Gogolla, U. Hohenstein, K. Hülsmann, P. Löhr-Richter, G. Saake, H.-D. Ehrich, Data &; Knowledge Engineering 9 (1992) 157–204.

Incremental Design of Conceptual Database Schemata with CADDY
P. Löhr-Richter, G. Engels, Incremental Design of Conceptual Database Schemata with CADDY, Leiden University, Leiden University, P.O. Box 9500, 2300 RA Leiden, The Netherlands, 1991.

Formal Semantics of an Entity-Relationship Query Language
U. Hohenstein, G. Engels, in: Proceedings of the 9th International Conference on Entity-Relationship Approach (ER 90), Lausanne, Switzerland, ER Institute, 1990, pp. 177–188.

Elementary Actions on an Extended Entity-Relationship Database
G. Engels, in: Proceedings of the Workshop on Graph Grammars and Their Application to Computer Science (1990), Bremen (Germany), Springer, Berlin/Heidelberg, 1990, pp. 344–362.

Konzepte einer Software-Architektur-Beschreibungssprache
J. Ebert, G. Engels, in: Software-Entwicklung: Konzepte, Erfahrungen, Perspektiven, Fachtagung, 1989, Marburg (Germany), Springer, Berlin/Heidelberg, 1989, pp. 238–250.

CADDY-O: Syntaxgestütztes, graphisches Entwerfen konzeptioneller Datenbankschemata
G. Engels, in: Tagungsband GI-Fachtagung “Interaktive Schnittstellen Für Informationssysteme”, TU Clausthal, Notizen Zu Interaktive Systeme, 1989, pp. 1–16.

CADDY: Computer-Aided Design of Non-Standard Databases
G. Engels, U. Hohenstein, K. Hülsmann, P. Löhr-Richter, H.-D. Ehrich, in: Proceedings of the International Conference on System Development Environments &; Factories, Berlin, Germany, Pitman Publishing, Berlin, 1989.

Benutzerschnittstelle und Architektur der integrierten Datenbankentwurfsumgebung CADDY (Kurzfassung)
G. Engels, Benutzerschnittstelle Und Architektur Der Integrierten Datenbankentwurfsumgebung CADDY (Kurzfassung), TU Braunschweig, 1989.

Programmentwicklungsumgebungen: Konzepte und Realisierung
G. Engels, W. Schäfer, Programmentwicklungsumgebungen: Konzepte Und Realisierung, Teubner, Stuttgart, 1989.

A Highly Integrated Tool Set for Program Development Support
G. Engels, T. Janning, W. Schäfer, in: Proceedings of the Conference on ACM SIGSMALL/PC Symposium on ACTES (SIGSMALL 1988), Cannes (France), ACM Press, New York, NY, USA, 1988, pp. 1–10.

Konzeption einer integrierten Datenbank-Entwurfsumgebung
G. Engels, U. Hohenstein, L. Neugebauer, G. Saake, H.-D. Ehrich, in: Proceedings of DBTA/SI Data Dictionaries Und Entwicklungswerkzeuge Für Datenbank-Anwendungen, Zürich, Switzerland, Verlag der Fachvereine an den Schweiz. Hochschulen und Techniken, 1988, pp. 151–157.

Auf dem Weg zu einer integrierten Datenbank-Entwurfsumgebung
G. Engels, U. Hohenstein, G. Saake, H.-D. Ehrich, in: G. Engels, U. Hohenstein, G. Saake, H.-D. Ehrich (Eds.), Proceedings of the GI-Workshop on “Sprachspezifische Programmierumgebungen,” G. Snelting, Darmstadt (Germany), 1988, pp. 38–51.