@INPROCEEDINGS{Ri+92, author = {Norbert Ritter and Bernhard Mitschang and M. Gesmann and A. Grasnickel and Theo Härder and C. Huff and C. Hübel and W. Käfer and H. Schöning and B. Sutter}, title = {On Structuring Primitives and Communication Primitives for Design Environments}, booktitle = {Symposium on Computer-based Design Environments}, year = {1992} }