Ebert, Jürgen, and Gregor Engels. Ein Konzept Zur Beschreibung von Software-Architekturen. EWH Koblenz, 1988.
LibreCat: /record/8186

Engels, Gregor, Thorsten Janning, and Wilhelm Schäfer. “Die Benutzerschnittstelle Einer Integrierten Modula-2 Programmentwicklungsumgebung.” In Proceedings of GI-Workshop Sprachspezifische Programmierumgebungen, Darmstadt, Germany, 1988.
LibreCat: /record/8258

Engels, Gregor, and Andy Schürr. “A Hybrid Interpreter in a Software Development Environment.” In Proceedings of the 1st European Software Engineering Conference (ESEC ’87), Strasbourg (France), 289:80–88. Berlin/Heidelberg: Springer, 1987.
LibreCat: /record/7816

Engels, Gregor, Manfred Nagl, and Wilhelm Schäfer. “On the Structure of Structure-Oriented Editors for Different Applications.” In Proceedings of the ACM SIGSOFT/SIGPLAN Software Engineering Symposium on Practical Software Development Environments, Palo Alto, USA, 22:190–98. ACM SIGPLAN Notices, 1987.
LibreCat: /record/7817

Engels, Gregor, Claus Lewerentz, and Wilhelm Schäfer. “Graph Grammar Engineering: A Software Specification Method.”https://doi.org/dx.doi.org/10.1007/3-540-18771-5__In Proceedings of the 3rd International Workshop on Graph-Grammars and Their Application to Computer Science, Warrenton, VA (USA), 291:186–201. Berlin/Heidelberg: Springer, 1987.https://doi.org/dx.doi.org/10.1007/3-540-18771-5 .
LibreCat: /record/8257
DOI: dx.doi.org/10.1007/3-540-18771-5

Engels, Gregor, Claus Lewerentz, Manfred Nagl, and Wilhelm Schäfer. “On the Structure of an Incremental and Integrated Software Development Environment.” In Proceedings of the 19th Hawaii International Conference on System Sciences, Hawaii, USA, 2a:585–97, 1986.
LibreCat: /record/7815

Engels, Gregor, and Andrea Sandbrink. “Experiences with a Hybrid-Interpreter Based on Incremental Compilation Techniques.” In Proceedings of the Workshop on Compiler Compilers and Incremental Compilation Techniques, Bautzen, 12:172–84. Bautzen: Berlin(Ost): Akademie der Wissenschaften der DDR, 1986.
LibreCat: /record/8256

Engels, Gregor. Graphen Als Zentrale Datenstrukturen in Einer Software-Entwicklungsumgebung, 1986.
LibreCat: /record/7588

Engels, Gregor, and Wilhelm Schäfer. “Graph Grammar Engineering: A Method Used for the Development of an Integrated Programming Support Environment.” In Proceedings of the International Joint Conference on Theory and Practice of Software Development (TAPSOFT 1985), Berlin (Germany), 186:179–93. LNCS. Berlin/Heidelberg: Springer, 1985.
LibreCat: /record/7813

Engels, Gregor, and Wilhelm Schäfer. “The Design of an Adaptive and Portable Programming Support Environment.” In Proceedings of the International Computing Symposium, Amsterdam (The Netherlands). Florenz, 1985.
LibreCat: /record/7814

Nagl, Manfred, Gregor Engels, Rupert Gall, and Wilhelm Schäfer. “Software Specification by Graph Grammars.”https://doi.org/dx.doi.org/10.1007/BFb0000113__In Proceedings of the 2nd International Workshop on Graph-Grammars and Their Application to Computer Science, Osnabrück (Germany), 153:267–87. LNCS. Berlin/Heidelberg: Springer, 1983.https://doi.org/dx.doi.org/10.1007/BFb0000113 .
LibreCat: /record/8255
DOI: dx.doi.org/10.1007/BFb0000113

Engels, Gregor, Rupert Gall, Manfred Nagl, and Wilhelm Schäfer. “Software Specification Using Graph Grammars.”http://dx.doi.org/10.1007/BF02251236__Computing 31, no. 4 (1983): 317–46.http://dx.doi.org/10.1007/BF02251236 .
LibreCat: /record/7411
DOI: http://dx.doi.org/10.1007/BF02251236

Engels, Gregor, Udo Pletat, and Hans-Dietrich Ehrich. “An Operational Semantics for Specifications of Abstract Data Types with Error Handling.”http://dx.doi.org/10.1007/BF00265557__Acta Informatica 9, no. 3 (1983): 235–54.http://dx.doi.org/10.1007/BF00265557 .
LibreCat: /record/7412
DOI: http://dx.doi.org/10.1007/BF00265557

Engels, Gregor, and Wilhelm Schäfer. “Specification of a Programming Support Environment by Graph Grammars.” In Proceedings of the Conference on Graphtheoretic Concepts in Computer Science (WG), München (Germany), 47–62. München/Leipzig: Hanser, 1982.
LibreCat: /record/7811

Pletat, Udo, Gregor Engels, and Hans-Dietrich Ehrich. “An Operational Approach to Conditional Algebraic Specifications.” In Proceedings of the 7eme Colloque Sur Les Arbres En Algebre et En Programmation, Lille (France), 82:254–70, 1982.
LibreCat: /record/7812

Engels, Gregor, Udo Pletat, and Hans-Dietrich Ehrich. Handling Errors and Exceptions in the Algebraic Specifications of Data Types. University of Osnabrück, 1981.
LibreCat: /record/8184

Pletat, Udo, Gregor Engels, and Hans-Dietrich Ehrich. Operational Semantics of Algebraic Specifications with Conditional Equations. University of Dortmund, Department of Computer Science, 1981.
LibreCat: /record/8185