Iermakov, Sergii, Oleg Khudolii, and Denys Chupikhin. “Discriminant Analysis: Impact of the Number of Repetitions on the Effectiveness of Teaching Boys Aged 7 Throwing a Small Ball”. Journal of Learning Theory and Methodology 2, no. 2 (June 30, 2021): 75–81. Accessed March 28, 2024. https://ltmjournal.com/e/article/view/25.