Grau-Valldosera, Josep, and Julià Minguillón. “Rethinking Dropout in Online Higher Education: The Case of the Universitat Oberta De Catalunya”. The International Review of Research in Open and Distributed Learning 15, no. 1 (January 15, 2014). Accessed July 15, 2024. https://www.irrodl.org/index.php/irrodl/article/view/1628.