1. Cold Forging Today and Tomorrow;Lange;Wire35,1985
2. Computer Aided Forging Design;Bramley;Annals of the CIRP,1987
3. Investigation of radial extrusion parameters (in Serbocroat);Plancak;Obrada deformisanjem u masinstvu,1989
4. State of the art and development trends in cold forging technology;Geiger,1991
5. Cold Extrusion and Upsetting;Geiger,1969