Kasyan , Sergey Petrovich. “OPEN EDUCATION AT THE PRESENT STAGE: ESSENCE AND MAIN TRENDS”. Actual Problems in the System of Education: General Secondary Education Institution – Pre-University Training – Higher Education Institution 1, no. 2 (June 26, 2022): 463–471. Accessed November 28, 2024. https://jrnl.nau.edu.ua/index.php/APSE/article/view/16631.