Hęclik, Karol, Lucjan Dobrowolski, Marcin Jaromin, and Iwona Zarzyka. “A Practical Test of Distance Learning During the COVID-19 Lockdown”. International Journal of Research in E-learning 9, no. 1 (May 23, 2023): 1-26. Accessed May 12, 2024. https://journals.us.edu.pl/index.php/IJREL/article/view/14623.