Juan Méndez Vergaray, Edward Flores, C. A. L. U. (2021). The Impact of COVID-19 on the Teaching Work: From Face-to-Face to Virtual. Turkish Journal of Computer and Mathematics Education (TURCOMAT), 12(6), 2125–2131. Retrieved from https://www.turcomat.org/index.php/turkbilmat/article/view/4818