Siedykh, Kyrylo, Olha Ivashchenko, Pavol Bartik, and Viktoria Veremeenko. 2022. “Pattern Recognition: Effectiveness of Teaching Boys Aged 15 the Press Headstand and Handstand”. Journal of Learning Theory and Methodology 3 (1). Kharkiv, Ukraine:18-24. https://doi.org/10.17309/jltm.2022.1.03.