Litvin, F, T Bruk, P Terekhov, N Osipova, and K Kosoryghina. “COMPREHENSIVE APPLICATION OF NATURAL BIOSTIMULATORS IN THE TRAINING OF ELITE ATHLETES”. Human. Sport. Medicine 18, no. S (November 1, 2018): 135-139. Accessed April 3, 2025. https://hsm.susu.ru/hsm/en/article/view/302.