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Kang, M. & Kang, J. (2008). Investigating the relationships of social presence, satisfaction and learning achievement in the blended learning environment. In J. Luca & E. Weippl (Eds.), Proceedings of ED-MEDIA 2008--World Conference on Educational Multimedia, Hypermedia & Telecommunications (pp. 717-720). Vienna, Austria: Association for the Advancement of Computing in Education (AACE).