1. Tverlid S. Modeling of friction in the bearing chanel of dies for extrusion of aluminium sections. Dissertation thesis, 147, Norwegian University of Machine Design and Materials Technology, Trondheim, 1997.
2. Die sachgerechte Prüfung und Wärmebehandlung von Warmarbeitsstählen;Schruff;Härterei Tech Mitt,1998
3. Plasmanitrieren von Aluminium-Strangpresswerkzeugen;Steiner;Elektrowärme Int,1994
4. Tribological simulation of aluminium hot extrusion;Björk;Wear,1999
5. Material flow and pressure prediction when extruding through bridge dies;Shepard;Z Metallkd,1998