1. Proc. Neuere Entwickl. Massivumf.;Geiger,1981
2. Tribology in Metalworking, Friction, Lubrication and Wear;Schey,1983
3. Proc. 10th NAMRC;Gräbener,1982
4. Proc. 7th Int. Cold Forging Congr.;Bay,1985
5. Proc. 4th Int. Conf. Prod. Engn.;Andreasen,1980