Comparative study spoc vs. Mooc for socio-technical contents from usability and user satisfaction 2019, Artículos Autores Lemos de Carvalho, Giovani, Jr. Cebrian Robles, Daniel Cebrian De la Serna, Manuel Raposo Rivas, Manuela Revista Turkish Online Journal of Distance Education Vol. 20 (páginas 4 a 20) DOI