Kasian Сергій Петрович. “MIXED EDUCATION IN GENERAL SECONDARY EDUCATION”. Actual Problems in the System of Education: General Secondary Education Institution – Pre-University Training – Higher Education Institution 1, no. 1 (September 2, 2021): 147–149. Accessed August 14, 2022. https://jrnl.nau.edu.ua/index.php/APSE/article/view/15850.