6Weiser, M.The Computer for the Twenty-First Century [J]. Scientific American, 1991,(3):94-100.
7Li., L.Y., Zheng, Y.L., Ogata, H., & Yano, Y. Research On Pervasive E Learning System Development[C], Proc.of E-Learn2003:595-598.
8Chen, Y.S., Kao, T.C., Shen, J.P., & Chiang, C.Y..A Mobile Scaffolding-Aid-Based Bird -Watching Learning System[C], Proc. of IEEE International Workshop on Wireless and Mobile Technologies in Education, 2002:15-22.
9Li., L.Y,, Zheng, Y.L., Ogata, H,, & Yano, Y. A Conceptual Framework of Computer-supported Ubiquitous Learning Environment[C], Proc.of The IASTED International Conference Web-based Education:243-248.
10Li., L.Y., Zheng, Y.L., Ogata, H., & Yano, Y. Ubiquitous Computing in Learning: Toward a Conceptual Framework of Ubiquitous Learning Environment[J]. Journal of Pervasive Computing and Communications,2005,(3):207-215.
