6Anderson,C.(2OO6).The Long Tail:Why the Future of Business is Selling Less of More[M].CA:Hyperion.
7Siemens.G.(2OO5).Connectivism:A Learning Theory for the Digital Age[J/OL].[2011-11-01].http:/www.elearnspace. org/Articles/Connectivism.htm.
8Nilsson, M., Palmer,M. & Naeve,A.(2OO2).Semantic Web Metadata for e-Learning-Some Architectural Guidelines. [EB/OL].[2011-11-01 ],http://www2002.org/CDROM/alternate/744.
9Bennett, S. , Maton K. , & Kervin, L. ( 2008 ). The ' digital natives' debate:A critical review of the evidence[J]. British journal of educational technology,39(5) :775-786.
10Blei, D. (2011). Introduction to pmbabilistic topic models [ EB/OL]. Communications of the ACM ( in press). [ 2011-10-30 ]. http ://www. cs. princeton. edu/-blei/papers/Blei2011. pdf.