H. P. Frei, Daniel L. Weller, Robin Williams. A graphics-based programming-support system. In S. H. Chasen, Richard L. Phillips, editors, Proceedings of the 5th Annual Conference on Computer Graphics and Interactive Techniques, SIGGRAPH 1978, Atlanta, GA, USA, August 23-25, 1978. pages 43-49, ACM, 1978. [doi]
Abstract is missing.