1. Behavior Engine Manual, BE Software, 1995
2. Ontologies for Enterprise Modelling: Toronto Virtual Enterprise Model;Fox,1994
3. INPRO mbH 1994 (in German) Projectinfomration, Unterstützung des Methodenplaner.
4. Product Modeling;Krause;Annals of the CIRP,1993
5. Distributed Product Design;Krause;Annals of the CIRP,1994