1. Hooker Extrusion of Sintered Iron Preforms;Venkatraman,1983
2. C.I.R.P. Production Engineering Dictionary, Vol. 5, Cold Forging and Cold Extrusion, Verlag W. Girardet, Essent, Definition Number 5126.
3. The cold forging of ferrous P/M preforms;Obara,1974
4. Effect of Friction and Temperature on the Combined Forward and Backward Can Extrusion;Venugopal,1982