Vysotskaya T, Golubnichy S. Development of special endurance for cross-country skiers of 15-17 years old. J. Hum. Sport Exerc. [Internet]. 2021 Mar. 22 [cited 2024 May 10];16(2proc):S212-S220. Available from: https://www.jhse.ua.es/article/view/2021-v16-n2-proc-development-special-endurance-cross-country-ski