Cass, M., S. Isabel, R. Eli, and P. Mayoral. “Using Self-Study Guides to Enhance in-Classroom Face-to- Face Learning Among Mexican University Students”. CIEX JOURNAL, vol. 1, no. 14, Apr. 2022, pp. 35-44, https://journal.ciex.edu.mx/index.php/cJ/article/view/136.