1. The self-regulated learning and the learning environment in Distance Education.;S.Armakolas;Proceedings of the 8th International Conference in Open and Distance Learning,2015
2. Atkins, D. E., Brown, J. S., & Hammond, A. L. (2007). A review of the open educational resources (OER) movement: achievements, challenges, and new opportunities. Menlo Park: The William and Flora Hewlett Foundation. Retrieved May 12, 2017, from http://www.hewlett.org/uploads/files/ReviewoftheOERMovement.pdf
3. Attwell, G. (2007). The personal learning environments: The future of eLearning? eLearning Papers, 2(1). Retrieved May, 2017, from http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.97.3011&rep=rep1&type=pdf
4. Using social psychology to motivate contributions to online communities