4MeDevitt Barb. Learner autonomy and the need for learner training [J]. Language Learning Journal, 1997(16): 34-39.
5Desmond Keegan. From D-Learning, to E-Learning, to M-Learning [EB/OL]. http ://deposit. fernuni-hagen, de/1920.
6Smordal O, Gregory J, Langseth K J. PDAs in Medical Education and Practice [C]//Milrad M. Proceedings of IEEE International Workshop on Wireless and Mobile Technologies in Education. Los Alamitos: IEEE Computer Society, 2002 : 140-146.
