Sirotová, Mariana, Veronika Michvocíková, and Krzysztof Rubacha. “Quasi-Experiment in the Educational Reality”. Journal of Education Culture and Society 12, no. 1 (June 17, 2021): 189–201. Accessed September 26, 2021. https://jecs.pl/index.php/jecs/article/view/1317.