Reis, C. F. de S. ., Simões, M. ., & Flores-Tena, M. . (2021). Students’ pre and during COVID-19 perception of higher education switch to online: An exploratory study in Portugal. Cypriot Journal of Educational Sciences, 16(5), 2368–2377. https://doi.org/10.18844/cjes.v16i5.6352