6E.Haller,E.Schiller.The Significance of Digital Manufacturing within the New Planning Process,in:Proceedings of the IFIPWG 5.7 Working Conference on Human Aspects in Production Management,2003,12.
7Gunter Wohlke,Emmerich Schiller.Digital Planning Validation in automotive industry.Computers in Industry Volume: 2005,56(4):325-333.