2Frank Rennie.The Use of Flexible Learning Resources for Geographically Distributed Rural Students [J]. Distance Education. 2003, (5) : 25-40.
3Khoja,Shariq; Scott, Richard E. Creating e-learning resources in preventive medicine for developing countries [J]. Journal of Telemedicine & Telecare, 2007(5):105-106.
10Calverley, G. & Shephard, K. (2003) . Assisting the uptake of on-line resources: why good learning resources are not enough [J]. Computers & Education, Vol. 41,205-24.