Бондар Анастасія Сергіївна (Anastasia B., Салтан Наталія Миколаївна (Nataliia S., and Салтан Олександр Миколайович (Oleksandr S. “Calendar of Holding Sports Competitions As a Source in Study of Features of Development of Domestic Sport in the 30s of the Xxth Century”. Slobozhanskyi Herald of Science and Sport, no. 4(48), Aug. 2015, pp. 26-30, doi:10.15391/snsv.2015-4.004.