1. Rocchio J J. Relevance Feedback in Information Retrieval[M]. Salton G. The SMART Retrieval System: Experiments in Automatic Document Processing. Prentice-Hall, (1971).
2. Zheng LIU, Shouqian SUN, Yunhe PAN, Classifying Product Form for Design Knowledge Reuse, Journal of Mechanical Engineering, Vol. 45, Apr. 2009. (in Chinese).
3. Hui-ping LIN, Yu-shun FAN, Chen HUANG, Meta-model-based knowledge management in product design, Computer Integrated Manufacturing Systems, Vol. 13, Apr. 2007. (in Chinese).
4. Liang-dong ZHANG, The Research of Web-Based Integrated Engineering Drawing Management System, ChengDu, SiChuan University, 2005. (in Chinese).
5. Erjing CHENG, Research on Technologies of Collaborative Virtual Product Development Based Knowledge Warehouse, ChengDu, SiChuan University, 2005. (in Chinese).