8Geissbuhler A, Baqayoko CO, Ly O. The RAFT network : 5 years of distance continuing medical education and tele-consultations over the Internet in French-speaking Africa. Int J Med Inform, 2007, 76(5-6) :351-356.
9Cantrell SW, O' Leary P, Ward KS. Strategies for success in online learning. Nuts Clin North Am,2008,43(4) :547-555.
9Sebastianelli R, Tamimi N. Business statistics and management science online: teaching strategies and assessment of student learning [J]. Journal of Education for Business,2011 ,86(6) :317-325.
10Lam K. Assessing student achievement and progress with online examinations: some pedagogical and technical issues[J]. International Journal on E-Learning, 2008, 7 (3) : 383-402.