Каршиганова, Е., Усина , Ж. ., & Кусмиденов , М. . (2022). Professionals and amateurs: a comparative analysis of the coaching activities of chess players: Каршиганова Е.М., Усина Ж.А., Кусмиденов М.Е. Theory and Methods of Physical Education, 70(4), 115–122. https://doi.org/10.48114/2306-5540_2022_4_115