1. Brinton, C.G., Chiang, M., Jain, S., Lam, H., Liu, Z., Wong, F.M.F.: Learning about social learning in MOOCs: from statistical analysis to generative model. IEEE Trans. Learn. Technol. 7(4), 346–359 (2014)
2. Coetzee, D., Fox, A., Hearst, M.A., Hartmann, B.: Should your MOOC forum use a reputation system? In: Proceedings of the 17th ACM Conference on Computer Supported Cooperative Work and Social Computing, pp. 1176–1187. ACM (2014)
3. Ferguson, R., Clow, D.: Examining engagement: analysing learner subpopulations in massive open online courses (MOOCs). In: Proceedings of LAK 2015, pp. 51–58 (2015)
4. Fischer, H., Dreisiebner, S., Franken, O., Ebner, M., Kopp, M., Köhler, T.: Revenue vs. costs of MOOC platforms. Discussion of business models for xMOOC providers based on empirical findings and experiences during implementation of the project iMOOX. In: Proceedings of ICERI 2014, pp. 2991–3000. IATED (2014)
5. Gunawardhana, P., Palaniappan, S.: Gamification. J. Adv. Appl. Sci. (JAAS) 3(02), 51–58 (2005). AROPUB