5Roxana Moreno, Richard E. Mayer. Personalized Messages That Promote Science Learning in Virtual Environment [J]. Journal of Educational Psychology, 2004, ( 1 ) : 165 - 173.
6Chih - Ming Chen, Hahn - Ming Lee, Ya - Hui Chen, Personalized e-learning system using Item Response Theory [ J ]. Computers & Education, 2005, (3) :237 - 255.
7Gediminas Adomavicius, Alexander Tuzhilin. Toward the Next Generation of Recommender Syetem [ J ]. IEEE Transaction on Knowledge and Data Engineering, 2005, (6) : 734-749.
8Younghee Woo, Thomas C. Reeves. Meaningful interaction in web -based learning: A social constructivist interpretation[J]. The Interact and Higher Education, 2007, ( 1 ) : 15 - 25.
9Han Jiawei,Kamber M. Data. Mining - concepts and techniques [ M ]. San Francisco, USA : Morgan Kaufmann Publishers, 2001.