[1] World Health Organization Coronavirus.https://www.who.int/health-opics/coronavirus#tab=tab_1. 2020.
[2] John Hopkins University. Global map.
https://coronavirus.jhu.edu/. 2021.
[3] Pham T, Nguyen H. COVID-19: Challenges and opportunities for Vietnamese higher education. Higher Education in Southeast Asia and beyond. 2020; 8:22-24
[4] Khan MA, Nabi MK., Khojah M, Tahir M. Students’ perception towards e-learning during COVID-19 pandemic in India: An empirical study. Sustainability, 2021; 13(1):57.
[5] Khadem al-Hosseini R. Lived experiences of teachers, students and parents in virtual education of elementary school science during the covid-19 epidemic in Barkhar, Isfahan. Department of Educational Technology, Faculty of Educational Sciences and Psychology, Isfahan University. 2019. [Persian]
[6] Ali Bakhsh J. Comparison of the effect of virtual education through happy program and educational television on self-regulated learning and satisfaction of elementary students. Master's thesis, educational technology. Chabahar International University. 2021. [Persian]
[7] Kuze Kanani M.Investigating the effective factors in the quality of educational services on the satisfaction of physical education female students of second secondary school in Urmia city in virtual education. Faculty of Management and Accounting, Department of Management. Azarabadgan Institute of Higher Education. 2021. [Persian]
[8] Kargar Azad Z. Investigating the effect of virtual education website quality on the satisfaction level of virtual students based on the WebQual model (case study: virtual students of Tehran University). Master's Thesis, Department of Management, University of Tehran. 2014. [Persian]
[9] Khoshbin Gashti AH. Measuring the quality of education through the happy program. Master's thesis. field of educational research. Faculty of Educational Sciences and Psychology, Mohaghegh Ardabili University. 2021. [Persian]
[10] Mahyoob M. Challenges of e-Learning during the COVID-19 Pandemic Experienced by EFL Learners. Arab World English Journal (AWEJ), 2020; 11(4).