@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}
}