Khudolii, Oleg, Olena Kapkan, Sergii Harkusha, Svitlana Marchenko, and Viktoriia Veremeenko. 2020. “Motor Skills Development: Optimization of Teaching Boys Aged 15 Press Headstand and Handstand”. Physical Education Theory and Methodology 20 (1):42-48. https://doi.org/10.17309/tmfv.2020.1.06.