Kovalenko, Y.O., and V.N. Boloban. “Structural Elements of Construction of Individual and Group Exercises’ Competition Compositions in Calisthenics”. Physical education of students 20, no. 1 (February 28, 2016): 12-20. Accessed January 27, 2022. https://sportedu.org.ua/index.php/PES/article/view/60.