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

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

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Ebert, J., &; Engels, G. (1994). 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, pp. 142–157). Berlin/Heidelberg: Springer.

Engels, G., &; Kappel, G. (1994). 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, pp. 434–441). Elsevier.

Engels, G., &; Ehrig, H. (1994). 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). Universitat de les Illes Balears, Departament de Ci.

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

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

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

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

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

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