1. N. Eversheim, M. Baumann: Computer in Industry, Vol. 17 (1991), p.287.
2. A. C. K. Choi, D. S. K. Chan and A. M. F. Yuen: Adv Manuf Technol, Vol. 19 (2002), p.377.
3. D. J. Ceglarekb and M. Szafarczykb: Annals of the CIRP, Vol. 47(1998), p.7.
4. Lei. Li, Shenmin. Wei and Junbo. Zhang: China Mechanical Engineering, Vol. 9(2003), p.1606. (In Chinese).
5. Xiaoyi. Wang, Youliang. Zhang and Fan. Zhang: China Mechanical Engineering, Vol. 16(2005), p.165. (In Chinese).