Frydrych-Szymonik, A., Augustyn, G. and Szyguła, Z. (2016) “Znaczenie snu i sposoby poprawy jego jakości u sportowców = Impact of sleep and methods to improve its quality in the context of sporting activities”, Journal of Education, Health and Sport, 6(5), pp. 157–176. Available at: https://apcz.umk.pl/JEHS/article/view/3518 (Accessed: 1 September 2024).