Publikation
Gregor Erbach
In: P. Jorrand; V. Sgurev (Hrsg.). Artificial Intelligence IV - Methodology, Systems, and Applications. Artificial Intelligence: Methodology, Systems, and Applications (AIMSA), September 19-22, Albena, Bulgaria, Pages 371-382, ISBN 0-444-88771-7, North-Holland Publishing Company, 1990.