Espada, María, José Antonio Navia, Patricia Rocu, and Maite Gómez-López. “Development of the Learning to Learn Competence in the University Context: Flipped Classroom or Traditional Method?”. Research in Learning Technology 280 (January 31, 2020). Accessed April 9, 2020. https://journal.alt.ac.uk/index.php/rlt/article/view/2251.