4Cheng Shein-Yung, Lin Chia-Sheng, Chen Hsien-Hsun, Heh JiaSheng. Learning and diagnosis of individual and class conceptual perspectives: an intelligent systems approach using clustering techniques. Computers & Education, Apr2005, Vol. 44 Issue 3, p257, p27.
7Shyi-Ming Chen,Shih-Ming Bai. Learning barriers diagnosis based on fuzzy roles for adaptive learning systems[J].Expert Systems with Applications,2009 (36): 11211 - 11220.
8杨宏宇.开放教育网上教学资源建设的反思.chinaonlineedu.com
9Tulving E.The effects of presentation and recall of ma-te-rial in free-recall learning. Journal of Verbal Learning and Verbal Behavior . 1967