Popovych, I. L. (2017) “Interrelations between changes in parameters of HRV, EEG and cellular immunity at patients with chronic pyelonephrite and cholecystite”, Journal of Education, Health and Sport, 7(10), pp. 11–23. Available at: https://apcz.umk.pl/JEHS/article/view/4913 (Accessed: 13 February 2025).