O. O. Popadynets’, 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”, J Educ Health Sport, vol. 9, no. 8, pp. 617–636, Sep. 2019.