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Catel, M. (2013). FB/Skype classroom "shell" extensions: trial and retributions. In T. Bastiaens & G. Marks (Eds.), Proceedings of E-Learn 2013--World Conference on E-Learning in Corporate, Government, Healthcare, and Higher Education (pp. 7-18). Las Vegas, NV, USA: Association for the Advancement of Computing in Education (AACE).