Azmi, Fatima M., and Heba Bakr Khoshaim. 2021. “The COVID-19 Pandemic and the Challenges of E-Assessment of Calculus Courses in Higher Education: A Case Study in Saudi Arabia”. International Journal of Learning, Teaching and Educational Research 20 (3):265-81. https://ijlter.myres.net/index.php/ijlter/article/view/145.