1. J. Jeswiet, E. Hagan, Proceedings of 9 th International Conference on Sheet Metal, Leuven (2001), p.165.
2. M. Bambach, G. Hirt, S. Junk, Proceedings of VII International Conference on Computational Plasticity, Barcelona (2003).
3. S. Matsubara, J. of JSTP Vol. 35 (2004), p.1311.
4. J. Jeswiet, J. R. Duflou, A. Szekeres, P. Levebre, Advanced Materials Research Vols. 6-8 (2005), p.487.
5. M. S. Shim, J.J. Park, Journal of Materials Processing Technology 113 (2001), p.654.