Штих [Shtykh V.] ВА, Сігал [Sigal N.] НС. Approach to the classification of olympic sports on objective criteria in determining the degree of their extremal. SHSS [Internet]. 2012Oct.30 [cited 2024Dec.23];(4(31):162-5. Available from: https://journals.uran.ua/index.php/1991-0177/article/view/21962