1. Chitkara NR, Celik KF. A generalized CAD/CAM solution to three-dimensional off-centric extrusion of shaped sections using upper-bound analysis and some experiments, PhD thesis. Manchester UK, Manchester: University of Manchester institute of science and technology; 1995.
2. An analyses for drawing and extrusion of polynomial section;Jeneja;Int Mach Tool Des Res Conf,1975
3. Some theoretical consideration for the direct drawing of section rod from round bar;Basily;Int J Mech Sci,1976
4. Webster W. A three dimensional analysis of extrusion and metal forming by the finite element method, PhD thesis. University of Missouri-Rolla; 1978.
5. Nagpal V, Altan T. Analysis of three dimensional metal flow in extrusion of shapes with the use of dual stream function. In: Proceedings of the 3rd NAMRC. Pittsburgh, PA: Carnegie-Mellor University; May 1975.