Khudolii, O., O. Ivashchenko, M. Cieślicka, and O. Rafikov. “Discriminant Analysis: The Influence of Exercise Modes on the Effectiveness of the Process of Learning to Throw A Small Ball for 9-Year-Old Boys”. Journal of Learning Theory and Methodology, vol. 5, no. 1, Apr. 2024, pp. 20-24, doi:10.17309/jltm.2024.5.1.03.