Мулик, В. В. “Influence of Hypoxic Conditions of Lowlands and Midlands of Ukraine on the Functional State of Young Biathlonists Aged 14–16”. Slobozhanskyi Herald of Science and Sport, no. 2(52), Apr. 2016, pp. 70-74, doi:10.15391/snsv.2016-2.012.