9Frohberg,D.,Gth,C.&Schwabe,G.(2009).Mobile Learning Projects:A Critical Analysis of the State of the Art[J].Journal of Computer Assisted Learning,(4):307-331.
10Hwang,G.J.&Tsai,C.C.(2011).Research Trends in Mobile and Ubiquitous Learning:A Review of Publications in Selected Journals from 2001 to 2010[J].British Journal of Educational Technology,(d):65-70.