3M.-A. Storey B. Phillips M. Maczewski M. Wang. Evaluating the Usability of Web-based Learning Tools. Educational Technology & Society, 5 (3) 2002, ISSN 1436-4522.
4Duncan Lennox. Managing Knowledge with Learning Objects [DB/ OL].http://www.topclass.nl/downloads/M KLO_white_paper.pdf, Retrieved on December 17, 2010.
5http://www.cerbibo.com/about/detail.aspx [EB/OL]. Retrieved on May 12,2011.
7http://www.myip.cn/atutor.ca[EB/OL]. Retrieved on May 12,2011.
8LI J,WANG Q,WANG C,et al.Fuzzy keyword search over en-crypted data in cloud computing. INFOCOM’’10 . 2010
9MORETTI C,BUI H,HOLLINGSWORTH K,et al.All-pairs:an abstraction for data-intensive computing on campus grids. IEEE Transactions on Parallel and Distributed Systems . 2010
10DONG F,,LUO J,SONG A,et al.Resource load based stochasticDAGs scheduling mechanism for grid environment. HPCC’’10 . 2010