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2. Kang, M., Hahn, J., Yoo, E., Kim, B.: Validating a Technology Enhanced Student-Centered Learning Model. In: Proceeding of World Conference on Educational Multimedia, Hypermedia, and Telecommunications, pp. 3025–3034 (2011)
3. Pettenati, M.C.: Roadmap to PLE – A Research Route to Empower the Use of Personal Learning Environments (PLEs). Interaction Design & Architecture Journal, 11–12 (2010)
4. Open Educational Resources and The Personal Learning Environment,
http://www.slideshare.net/Downes/open-educational-resources-and-the-personal-learning-environment
5. Seven things You Should Know About Personal Learning Environments,
http://net.educause.edu/ir/library/pdf/ELI7049.pdf