Scientific and Methodological Bases of Adolescents’ Physical Activity in Extracurricular Activity. Fiz. vihov. sport kul’t. zdor. suchas. susp. [Internet]. 2016 Mar. 31 [cited 2024 Nov. 23];(1(33):40-6. Available from: https://sport.vnu.edu.ua/index.php/sport/article/view/37