Minkova, Yoana. “Analyses of Students’ Grades Before, During and After Covid-19 Pandemic: GradesCovid19Pandemic”. International Journal of Engineering and Computer Science 13, no. 09 (September 30, 2024): 26463–26467. Accessed November 7, 2024. https://ijecs.in/index.php/ijecs/article/view/4901.