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Ice, P., Swan, K., Kupczynski, L. & Richardson, J. (2008). The Impact of Asynchronous Audio Feedback on Teaching and Social Presence: A Survey of Current Research. In J. Luca & E. Weippl (Eds.), Proceedings of ED-MEDIA 2008--World Conference on Educational Multimedia, Hypermedia & Telecommunications (pp. 5646-5649). Vienna, Austria: Association for the Advancement of Computing in Education (AACE).