Popadynets’, O., A. Gozhenko, W. Zukow, and I. Popovych. “Interpersonal Differences Between of the Entropies of EEG, HRV, Immunocytogram and Leukocytogram”. Journal of Education, Health and Sport, vol. 9, no. 6, June 2019, pp. 534-45, https://apcz.umk.pl/JEHS/article/view/7170.