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Henri, F., Charlier, B. & Limpens, F. (2008). Understanding PLE as an Essential Component of the Learning Process. In J. Luca & E. Weippl (Eds.), Proceedings of ED-MEDIA 2008--World Conference on Educational Multimedia, Hypermedia & Telecommunications (pp. 3766-3770). Vienna, Austria: Association for the Advancement of Computing in Education (AACE).