3SOLLER A. Supporting social interaction in an intelli-gent collabo- rative learning system[J]. International Journal of ArtificialIntelli- gence in Education, 2001, 12(1):40-62.
6Siemens G. Learning Ecology, Communities, and Networks: Extending the Classroom[DB/OL].http://www.elearnspace.org/Articles/learning_ communities.htm,2013-10-13.
7Richardson A.An Ecology of Learning and the Role of E-Learning in the Learning Environment[DB/OL].http://unpanl.un.org/intradoc/groups/public/documents/apcity/unpan007791.pdf,2013-10-11.
8Loma Uden, Emesto Damiani.The future of Elearning: E-learning ecosystem[DB/OL].http://www.fcet.staffs.ac.uk/itw1/lorna_ince. pdf,2013-10-11.
9Chang.V,Guetl.C. E-Learning Ecosystem (ELES)-A Holistic Approach for the Development of more Effective Learning Environment for Small-to-Medium Sized Enterprises (SMEs)[ DB/OL]. http://ieeexplore.ieee.org/stamp/stamp.j sp?tp=&arnumber=4233744. htm,2013-10-12.
