Martín Padilla, Antonio Hilario, Eloy López Meneses, César Bernal Bravo, and Esteban Vázquez Cano. 2018. “The Research Observatory on the Massive Online Open Courses: MOOCSERVATORIO®”. IJERI: International Journal of Educational Research and Innovation, no. 10 (July). Sevilla, España:27-50. https://upo.es/revistas/index.php/IJERI/article/view/3455.