1985

Gregor Engels, Wilhelm Schäfer: Graph Grammar Engineering: A Method Used for the Development of an Integrated Programming Support Environment. In H. Ehrig, C. Floyd, M. Nivat, J. W. Thatcher (eds.): Proceedings of the International Joint Conference on Theory and Practiceof Software Development (TAPSOFT 1985), Berlin (Germany). Springer (Berlin/Heidelberg), LNCS, pp. 179-193 (1985) 

Gregor Engels, Wilhelm Schäfer: The Design of an Adaptive and Portable Programming Support Environment. In G. Valle, G. Bucci (eds.): Proceedings of the International Computing Symposium, Amsterdam (The Netherlands). (1985)