1. C. Nikolopoulos, Expert System, Marcel Dekker, New York, 1997.
2. X. Xiangzhi, et al., Blanking Technology and Die CAD, National Defence Industrial Press, Beijing, 1996 (in Chinese).
3. M. Kamel, Y. Quintana, Generation of Concept Hierarchies for Engineering Knowledge-based Systems, Application of Artificial Intelligence in Engineering VII, Computational Mechanics Publications, 1992, pp. 107–124.
4. H. Bo, Z.K. Ni, Structural design of an intelligent decision system generator based on blackboard model, Comput. Res. Dev. 34 (5) (1997) 382–386 (in Chinese).
5. A knowledge-based system for strip layout design;Ann;Comput. Ind.,1994