2Chung-Hsien Hsu and Chih-Yung Chang, Design and Implementation of Mobile Learning Platform for Ubiquitous Learning[J]. Tamsui Oxford Journal of Mathematical Sciences, 2004, (1):105-118.
3Chabert ect, The Electronic Schoolbag, a CSCW workspace: presentation and evaluation [J].AI & Society, 2006, 3:403-404.