1. M. Yonglin, W. Baofeng, L. Zhanxiang, Iron and Steel 31 (1996) 25 (in Chinese).
2. L. Xianghua, Rigid Plastic FEM and Its Application in Rolling, Metallurgical Industry Press, China, 1994, p. 181.
3. J. Zhengyi, L. Xianghua, W. Guodong, Metal Forming Technol. 10 (1992) 12 (in Chinese).
4. M. Kiuchi, J. Yanagimot, in: Proceedings of the International Conference on Steel Rolling, Chiba, Japan, 1998, p. 227.