Petrov, L., Alexandrova, A., Kachaunov, M., Penov, R., Sheytanova, T. and Kolimechkov, S. (2021) “Effect of glutathione supplementation on swimmers’ performance”, Pedagogy of Physical Culture and Sports, 25(4), pp. 215–224. doi: 10.15561/26649837.2021.0403.