B.  Zhu, Ramsey, M., Chen, H., Hauck, R. V., Ng, T. D., and Schatz, B., ?Creating a Large Scale Digital Library for Geo-Referenced Information?, Digital Library?99, the 4th ACM Conference on Digital Libraries. 1999.

B.  Zhu, Ramsey, M., Chen, H., Hauck, R. V., Ng, T. D., and Schatz, B., ?Support Concept-Based Multimedia Information Retrieval: A Knowledge Management Approach?, ICIS?99, 20th Annual International Conference on Information Systems. 1999.