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Karabulut, A. & Correia, A. (2008). Skype, Elluminate, Adobe Connect, Ivisit: A comparison of Web-Based Video Conferencing Systems for Learning and Teaching. In K. McFerrin, R. Weber, R. Carlsen & D. Willis (Eds.), Proceedings of SITE 2008--Society for Information Technology & Teacher Education International Conference (pp. 481-484). Las Vegas, Nevada, USA: Association for the Advancement of Computing in Education (AACE).