Melicherikova, Zuzana, and Andrej Piovarci. “Experience With Massive Open Online Courses in Slovakia”. Journal of e-Learning and Knowledge Society 12, no. 1 (January 25, 2016). Accessed November 22, 2019. https://www.je-lks.org/ojs/index.php/Je-LKS_EN/article/view/1048.