7[4]Lesser, V., Horling, B., Klassner, F., et al. BIG: a resource-bounde d information gathering agent. In: AAAI Press Staff ed. Proceedings of the 5th N ational Conference on Artificial Intelligence (AAAI-98). Madison, WI: MIT Press , 1998. 243～254. 被引量：1
8[5]Bowman, C.M., et al. The harvest information discovery and access sys tem. Computer Networks and ISDN Systems, 1995,28(1,2):119～125. 被引量：1
9[6]Salton, G. Automatic Text Processing: The Transformation, Analysis, and R etrieval of Information by Computer. Reading, Mass: Addison-Wesley, 1989. 146～ 154. 被引量：1
10[7]Dunlop, M.D., Rijsbergen, C.J. van. Hypermedia and free text retrieval. I nformation Processing and Management, 1993,29(3):287～298. 被引量：1
