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Bravo, J. & García-Magariño, I. (2011). A technique for designing learning activities in virtual environments. In T. Bastiaens & M. Ebner (Eds.), Proceedings of ED-MEDIA 2011--World Conference on Educational Multimedia, Hypermedia & Telecommunications (pp. 923-931). Lisbon, Portugal: Association for the Advancement of Computing in Education (AACE).