@inproceedingsEngels_1990, place=Berlin/Heidelberg, title=Elementary Actions on an Extended Entity-Relationship Database, volume=532, DOI=http://dx.doi.org/10.1007/BFb0017372, booktitle=Proceedings of the workshop on Graph Grammars and Their Application to Computer Science (1990), Bremen (Germany), publisher=Springer, author=Engels, Gregor, year=1990, pages=344–362 

@inproceedingsEbert_Engels_1989, place=Berlin/Heidelberg, series=Informatik-Fachberichte, title=Konzepte einer Software-Architektur-Beschreibungssprache, volume=212, booktitle=Software-Entwicklung: Konzepte, Erfahrungen, Perspektiven, Fachtagung, 1989, Marburg (Germany), publisher=Springer, author=Ebert, Jürgen and Engels, Gregor, year=1989, pages=238–250, collection=Informatik-Fachberichte 

@inproceedingsEngels_1989, title=CADDY-O: Syntaxgestütztes, graphisches Entwerfen konzeptioneller Datenbankschemata, volume=18, booktitle=Tagungsband GI-Fachtagung “Interaktive Schnittstellen für Informationssysteme”, TU Clausthal, Notizen zu Interaktive Systeme, author=Engels, Gregor, year=1989, pages=1–16 

@inproceedingsEngels_Hohenstein_Hülsmann_Löhr-Richter_Ehrich_1989, place=Berlin, title=CADDY: Computer-Aided Design of Non-Standard Databases, booktitle=Proceedings of the International Conference on System Development Environments &; Factories, Berlin, Germany, publisher=Pitman Publishing, author=Engels, Gregor and Hohenstein, Uwe and Hülsmann, Klaus and Löhr-Richter, Perdita and Ehrich, Hans-Dietrich, year=1989 

@bookEngels_1989, title=Benutzerschnittstelle und Architektur der integrierten Datenbankentwurfsumgebung CADDY (Kurzfassung), publisher=TU Braunschweig, author=Engels, Gregor, year=1989 

@bookEngels_Schäfer_1989, place=Stuttgart, title=Programmentwicklungsumgebungen: Konzepte und Realisierung, publisher=Teubner, author=Engels, Gregor and Schäfer, Wilhelm, year=1989 

@inproceedingsEngels_Janning_Schäfer_1988, place=New York, NY, USA, title=A Highly Integrated Tool Set for Program Development Support, DOI=http://dx.doi.org/10.1145/62453.62454, booktitle=Proceedings of the conference on ACM SIGSMALL/PC symposium on ACTES (SIGSMALL 1988), Cannes (France), publisher=ACM Press, author=Engels, Gregor and Janning, Thorsten and Schäfer, Wilhelm, year=1988, pages=1–10 

@inproceedingsEngels_Hohenstein_Neugebauer_Saake_Ehrich_1988, title=Konzeption einer integrierten Datenbank-Entwurfsumgebung, booktitle=Proceedings of DBTA/SI Data Dictionaries und Entwicklungswerkzeuge für Datenbank-Anwendungen, Zürich, Switzerland, publisher=Verlag der Fachvereine an den Schweiz. Hochschulen und Techniken, author=Engels, Gregor and Hohenstein, Uwe and Neugebauer, Leonore and Saake, Gunter and Ehrich, Hans-Dietrich, year=1988, pages=151–157 

@inproceedingsEngels_Hohenstein_Saake_Ehrich_1988, place=Darmstadt (Germany), title=Auf dem Weg zu einer integrierten Datenbank-Entwurfsumgebung, booktitle=Proceedings of the GI-Workshop on “Sprachspezifische Programmierumgebungen”, publisher=G. Snelting, author=Engels, Gregor and Hohenstein, Uwe and Saake, Gunter and Ehrich, Hans-Dietrich, editor=Engels, Gregor and Hohenstein, Uwe and Saake, Gunter and Ehrich, Hans-D.Editors, year=1988, pages=38–51 

@bookEbert_Engels_1988, title=Ein Konzept zur Beschreibung von Software-Architekturen, publisher=EWH Koblenz, author=Ebert, Jürgen and Engels, Gregor, year=1988 

@inproceedingsEngels_Janning_Schäfer_1988, title=Die Benutzerschnittstelle einer integrierten Modula-2 Programmentwicklungsumgebung, booktitle=Proceedings of GI-Workshop Sprachspezifische Programmierumgebungen, Darmstadt, Germany, author=Engels, Gregor and Janning, Thorsten and Schäfer, Wilhelm, year=1988 

@inproceedingsEngels_Schürr_1987, place=Berlin/Heidelberg, title=A Hybrid Interpreter in a Software Development Environment, volume=289, booktitle=Proceedings of the 1st European Software Engineering Conference (ESEC ’87), Strasbourg (France), publisher=Springer, author=Engels, Gregor and Schürr, Andy, year=1987, pages=80–88 

@inproceedingsEngels_Nagl_Schäfer_1987, title=On the Structure of Structure-Oriented Editors for Different Applications, volume=22, number=1, booktitle=Proceedings of the ACM SIGSOFT/SIGPLAN Software Engineering Symposium on Practical Software Development Environments, Palo Alto, USA, publisher=ACM SIGPLAN Notices, author=Engels, Gregor and Nagl, Manfred and Schäfer, Wilhelm, year=1987, pages=190–198 

@inproceedingsEngels_Lewerentz_Schäfer_1987, place=Berlin/Heidelberg, title=Graph Grammar Engineering: A Software Specification Method, volume=291, DOI=dx.doi.org/10.1007/3-540-18771-5, booktitle=Proceedings of the 3rd International Workshop on Graph-Grammars and Their Application to Computer Science, Warrenton, VA (USA), publisher=Springer, author=Engels, Gregor and Lewerentz, Claus and Schäfer, Wilhelm, year=1987, pages=186–201 

@inproceedingsEngels_Lewerentz_Nagl_Schäfer_1986, title=On the Structure of an Incremental and Integrated Software Development Environment, volume=2a, booktitle=Proceedings of the 19th Hawaii International Conference on System Sciences, Hawaii, USA, author=Engels, Gregor and Lewerentz, Claus and Nagl, Manfred and Schäfer, Wilhelm, year=1986, pages=585–597 

@inproceedingsEngels_Sandbrink_1986, place=Bautzen, title=Experiences with a Hybrid-Interpreter Based on Incremental Compilation Techniques, volume=12, booktitle=Proceedings of the Workshop on Compiler Compilers and Incremental Compilation Techniques, Bautzen, publisher=Berlin(Ost): Akademie der Wissenschaften der DDR, author=Engels, Gregor and Sandbrink, Andrea, year=1986, pages=172–184 

@bookEngels_1986, title=Graphen als zentrale Datenstrukturen in einer Software-Entwicklungsumgebung, author=Engels, Gregor, year=1986 

@inproceedingsEngels_Schäfer_1985, place=Berlin/Heidelberg, series=LNCS, title=Graph Grammar Engineering: A Method Used for the Development of an Integrated Programming Support Environment, volume=186, booktitle=Proceedings of the International Joint Conference on Theory and Practice of Software Development (TAPSOFT 1985), Berlin (Germany), publisher=Springer, author=Engels, Gregor and Schäfer, Wilhelm, year=1985, pages=179–193, collection=LNCS 

@inproceedingsEngels_Schäfer_1985, place=Florenz, title=The Design of an Adaptive and Portable Programming Support Environment, booktitle=Proceedings of the International Computing Symposium, Amsterdam (The Netherlands), author=Engels, Gregor and Schäfer, Wilhelm, year=1985 

@inproceedingsNagl_Engels_Gall_Schäfer_1983, place=Berlin/Heidelberg, series=LNCS, title=Software Specification by Graph Grammars, volume=153, DOI=dx.doi.org/10.1007/BFb0000113, booktitle=Proceedings of the 2nd International Workshop on Graph-Grammars and Their Application to Computer Science, Osnabrück (Germany), publisher=Springer, author=Nagl, Manfred and Engels, Gregor and Gall, Rupert and Schäfer, Wilhelm, year=1983, pages=267–287, collection=LNCS