Günter Enderle, Ernst G. Schlechtendahl. The CAD-system REGENT. In Robert B. Hitchcock Sr., Donald J. Humcke, Stephen A. Szygenda, editors, Proceedings of the 12th Design Automation Conference, DAC '75, Boston, Massachusetts, USA, June 23-25, 1975. pages 231-240, ACM, 1975. [doi]
Abstract is missing.