1. Learning Technology Standards Committee. Draft Standard for Learning Object Metadata. Institute of Electrical and Electronics Engineers, 2002: 1-20.
2. Frank Farance, International Standards Strategies for Information Technology and Learning, Education and Training, International Conference on China Distance Learning Technology Standards, Beijing, 2001: 362-382.
3. Marty Hall, Larry Brown. Core Servlets and JavaServer Pages: Volume1: Core Technologies. 2nd edition, Person Education, Inc., 2004: 11-198.
4. Hine, J., W. Yao, et al. Architecture for Distributed OASIS Services. In: Proceedings of Middleware 2000, Volume 1795 of Lecture Notes in Computer Science, Hudson River Valley, New York, 2000: 107-112.
5. Deng Gui-shi, LI Wen-li. Agent-oriented Aid-modeling for the Distributed Activity Network [J], Journal of Systems Science and Systems Engineering, 2000, 9(1): 65-71.