Corradini, Andrea, and Reiko Heckel. “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), 2:46–55. Electronic Notes in Theoretical Computer Science . Elsevier, 1995.

Bardohl, Bernhard, Roswitha Bardohl, Paulo Castro, Hartmut Ehrig, Reiko Heckel, Leila Ribeiro, Daltro Nunes, and Alfio Martini. “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, Gregor, and Andy Schürr. “Encapsulated Hierarchical Graphs, Graph Types, and Meta Types.”http://dx.doi.org/10.1016/S1571-0661(05)80186-0__In Proceedings of the Joint COMPUGRAPH/SEMAGRAPH Workshop on Graph Rewriting and Computation (SEGRAGRA 1995), Volterra (Italy), 101–9. Electronic Notes in Theoretical Computer Science. Amsterdam, The Netherlands: Elsevier, 1995.http://dx.doi.org/10.1016/S1571-0661(05)80186-0 .

Heckel, Reiko, and Annika Wagner. “Ensuring Consistency of Conditional Graph Grammars - A Constructive Approach.”http://dx.doi.org/10.1016/S1571-0661(05)80188-4__In Proceedings of the Joint COMPUGRAPH/SEMAGRAPH Workshop on Graph Rewriting and Computation (SEGRAGRA 1995), Volterra (Italy), 2:118–26. Electronic Notes in Theoretical Computer Science. Elsevier, 1995.http://dx.doi.org/10.1016/S1571-0661(05)80188-4 .

Ehrich, Hans-Dietrich, Gregor Engels, J. Paredaens, and Jan Wegner, eds. Fundamentals of Object-Oriented Languages, Systems, and Methods. Vol. 95. Dagstuhl-Seminar-Report. Schloss Dagstuhl, Leibniz Center for Informatics, 1994.

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

Thoben, Wilfried, Hans-Jürgen Appelrath, Jens Rettig, and Stefan Sauer. “Berücksichtigung von Datenschutzaspekten in Einem Bevölkerungsbezogenen Krebsregister.” In Proceedings of the Conference on Medizin Und Information, Biometrie Und Epidemiologie (GMDS 1994), Dresden (Germany), 88–90. München: MMV Medizin Verlag, 1994.

Ebert, Jürgen, and Gregor Engels. “Structural and Behavioural Views on OMT-Classes.” In Proceedings of the International Symposium on Object-Oriented Methodologies and Systems (ISOOMS 1994), Palermo (Italy), 858:142–57. Berlin/Heidelberg: Springer, 1994.

Engels, Gregor, and Gerti Kappel. “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), 3:434–41. Elsevier, 1994.

Engels, Gregor, and Hartmut Ehrig. “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, Jürgen, and Gregor Engels. Observable or Invocable Behaviour - You Have to Choose. Vakgroep Informatica, Rijksuniversiteit Leiden, 1994.

Andries, Marc, and Gregor Engels. “Syntax and Semantics of Hybrid Database Languages.”http://dx.doi.org/10.1007/3-540-57787-4_2__In Proceedings of the International Workshop on Graph Transformations in Computer Science (1993), Dagstuhl (Germany), 776:19–36. LNCS. Berlin/Heidelberg: Springer, 1994.http://dx.doi.org/10.1007/3-540-57787-4_2 .

Engels, Gregor, and Luuk Groenewegen. “Specification of Coordinated Behaviour by SOCCA.”http://dx.doi.org/10.1007/3-540-57739-4_19__In Proceedings of the Third European Workshop on Software Process Technology (EWSPT 1994), Villard de Lans (France), 128–51. LNCS. Berlin/Heidelberg: Springer, 1994.http://dx.doi.org/10.1007/3-540-57739-4_19 .

Engels, Gregor, and Perdita Löhr. “Visual Specification of Complex Database Actions.” In Proceedings of the 2nd International East/West Database Workshop, Klagenfurt (Germany), 303–14. Berlin/Heidelberg: Springer, 1994.

Löhr-Richter, Perdita, and Gregor Engels. “Visuelles Spezifizieren von Komplexen Aktionen Auf Datenbankstrukturen.” GI-Datenbank Rundbrief 13 (1994): 33–35.

Ebert, Jürgen, and Gregor Engels. “Design Representation.” In Encyclopedia of Software Engineering, 382–94. John Wiley &; Sons, Inc., 1994.

Engels, Gregor, and Luuk Groenewegen. “SOCCA: Specifications of Coordinated and Cooperative Activities.” In Software Process Modelling and Technology, 71–102. Taunton: Research Studies Press, 1994.

Engels, Gregor, and A.A. Verrijn-Stuart. “Integrationsaspekte Bei Verteilter Software-Entwicklung.” In Fortschritt-Berichte VDI, 45–53. Reihe 10: Informatik/Kommunikationstechnik. VDI Verlag, 1993.

Andries, Marc, and Gregor Engels. A Hybrid Query Language for the Extended Entity Relationship Model. Vakgroep Informatica, Rijksuniversiteit Leiden, 1993.

Ehrig, Hartmut, and Gregor Engels. Towards a Module Concept for Graph Transformation Systems. Vakgroep Informatica, Rijksuniversiteit Leiden, 1993.