Golovachev A.I., Kolykhmatov V.I., Shirokova S.V., and Grushin A.A. “The Relationship of Leg Explosive Power With the Performance Efficiency of Ski Racers Aged 18-20 Years Old in Competitions at Various Distances”. Theory and Practice of Physical Culture, no. 6, Aug. 2025, pp. 20-24, http://www.tpfk.ru/index.php/TPPC/article/view/1377.