1. A quantitative synthesis of research findings relative to the pedagogical effectiveness of computer assisted instruction in elementary and secondary schools;Burns;Dissertation Abstracts International,1981
2. Marking strategies in metacognition-evaluated computer-based testing;Chen;Journal of Educational Technology and Society,2010
3. Dziuban , C. Hartman , J. Moskal , P. 2004 Blended Learning, EDUCAUSE Center for Applied Research (ECAR) Research Bulletin, 2004(7) http://www.educause.edu/ir/library/pdf/ERB0407.pdf