Popadynets’, O. O., A. I. Gozhenko, W. Zukow, and I. L. Popovych. “Peculiarities of Spectral Parameters of EEG, HRV and Routine Parameters of Immunity in Patients With Various Levels of the Entropy of EEG, HRV, Immunocytogram and Leukocytogram”. Journal of Education, Health and Sport, vol. 9, no. 8, Sept. 2019, pp. 617-36, https://apcz.umk.pl/JEHS/article/view/7381.