Lazarenko В. Г., and Kamantsev В. А. “Psychological Constitutions of Athletic Performance of Sledge Hockey Players”. Vestnik IzhGTU Imeni M.T. Kalashnikova, vol. 21, no. 4, Feb. 2019, pp. 240-4, doi:10.22213/2413-1172-2018-4-240-244.