Corradini A, Heckel R. A Compositional Approach to Structuring and Refinement of Typed Graph Grammars. In: Proceedings of the Joint COMPUGRAPH/SEMAGRAPH Workshop on Graph Rewriting and Computation (SEGRAGRA 1995), Volterra (Italy). Vol 2. Electronic Notes in Theoretical Computer Science . Elsevier; 1995:46-55.

Bardohl B, Bardohl R, Castro P, et al. GRAPHIT: Graphical Support and Integration of Formal and Semiformal Methods for Software Specification and Development. In: Proceedings of the 3rd German-Brazilian Workshop on Information Technology (1995), Berlin (Germany). Vol 26. Bilateral Seminars of the International Bureau. Forschungszentrum Jülich GmbH; 1995.

Engels G, Schürr A. Encapsulated Hierarchical Graphs, Graph Types, and Meta Types. In: Proceedings of the Joint COMPUGRAPH/SEMAGRAPH Workshop on Graph Rewriting and Computation (SEGRAGRA 1995), Volterra (Italy). Electronic Notes in Theoretical Computer Science. Amsterdam, The Netherlands: Elsevier; 1995:101-109. doi:http://dx.doi.org/10.1016/S1571-0661(05)80186-0

Heckel R, Wagner A. Ensuring Consistency of Conditional Graph Grammars - A constructive Approach. In: Proceedings of the Joint COMPUGRAPH/SEMAGRAPH Workshop on Graph Rewriting and Computation (SEGRAGRA 1995), Volterra (Italy). Vol 2. Electronic Notes in Theoretical Computer Science. Elsevier; 1995:118-126. doi:http://dx.doi.org/10.1016/S1571-0661(05)80188-4

Ehrich H-D, Engels G, Paredaens J, Wegner J, eds. Fundamentals of Object-Oriented Languages, Systems, and Methods. Vol 95. Schloss Dagstuhl, Leibniz Center for Informatics; 1994.

Cuny J, Ehrig H, Engels G, Rozenberg G, eds. Graph Gramars and Their Application to Computer Science, 5th International Workshop (1994), Selected Papers. Vol 1073. Berlin/Heidelberg: Springer; 1994. doi:http://dx.doi.org/10.1007/3-540-61228-9

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

Ebert J, Engels G. Structural and Behavioural Views on OMT-Classes. In: Proceedings of the International Symposium on Object-Oriented Methodologies and Systems (ISOOMS 1994), Palermo (Italy). Vol 858. Berlin/Heidelberg: Springer; 1994:142-157.

Engels G, Kappel G. Object-Oriented System Development: Will the New Approach Solve Old Problems? In: Proceedings of the IFIP 13th World Computer Congress on Information Processing, Hamburg (Germany). Vol 3. Elsevier; 1994:434-441.

Engels G, Ehrig H. Towards a Module Concept for Graph Transformation Systems: The Software Engineering Perspective. In: Proceedings Colloquium on Graph Transformation and Its Application in Computer Science. Vol B-19. Technical Report . Universitat de les Illes Balears, Departament de Ci; 1994.

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

Andries M, Engels G. Syntax and Semantics of Hybrid Database Languages. In: Proceedings of the International Workshop on Graph Transformations in Computer Science (1993), Dagstuhl (Germany). Vol 776. LNCS. Berlin/Heidelberg: Springer; 1994:19-36. doi:http://dx.doi.org/10.1007/3-540-57787-4_2

Engels G, Groenewegen L. Specification of coordinated behaviour by SOCCA. In: Proceedings of the Third European Workshop on Software Process Technology (EWSPT 1994), Villard de Lans (France). LNCS. Berlin/Heidelberg: Springer; 1994:128-151. doi:http://dx.doi.org/10.1007/3-540-57739-4_19

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

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

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

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

Engels G, Verrijn-Stuart AA. Integrationsaspekte bei verteilter Software-Entwicklung. In: Fortschritt-Berichte VDI. Reihe 10: Informatik/Kommunikationstechnik. VDI Verlag; 1993:45-53.

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

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