4Ruti Gafni. Quality Metrics for PDA - based M - Learning Information Systems [ J ], Interdisciplinary Journal of E - Learning and Learning Objects ,2009,05.
4[3]A Framework for Pedagogical Evaluation of virtual Learning Environments. Sandy Britain & Oleg Liber. www. jtap.ac. uk/reports/htm/jtap -041. html.
5[4]Quality On The Line. The National Education Association(NEA) and Blackboard Inc.
6[5]Evaluation of a Web - Based Course. Karen Moenkhaus & Robyn Rodgers. Technology & Distance Education.
7Eysenbach G,Diepgen T L.Towards quality management of medical information on the Internet:evaluation,labeling,and filtering of information[J].BMJ,1998,317:1496-1500.