Сикорский, Петр. “NEW APPROACHES TO THE PHYSICAL DEVELOPMENT OF STUDENTS IN THE PROCESS OF PRIMARY SCHOOL REFORM”. Scientific look into the future 3, no. 17-03 (January 1, 2021): 40–46. Accessed May 18, 2024. https://www.scilook.eu/index.php/slif/article/view/slif17-03-022.