1987

Gregor Engels, Andy Schürr: A Hybrid Interpreter in a Software Development Environment. In H.K. Nichols, D. Simpson (eds.): Proceedings of the 1st European Software Engineering Conference (ESEC '87), Strasbourg (France). Springer (Berlin/Heidelberg), pp. 80-88 (1987) 

Gregor Engels, Manfred Nagl, Wilhelm Schäfer: On the Structure of Structure-Oriented Editors for Different Applications. In P. Henderson (eds.): Proceedings of the ACM SIGSOFT/SIGPLAN Software Engineering Symposium on Practical Software Development Environments, Palo Alto, USA. ACM SIGPLAN Notices, pp. 190-198 (1987) 

Gregor Engels, Claus Lewerentz, Wilhelm Schäfer: Graph Grammar Engineering: A Software Specification Method. In H. Ehrig, M. Nagl, G. Rozenberg, A. Rosenfeld (eds.): Proceedings of the 3rd International Workshop on Graph-Grammars and Their Application to Computer Science, Warrenton, VA (USA). Springer (Berlin/Heidelberg), pp. 186-201 (1987)