LUKYANCHENKO, Oleksandr, MEL’NYK, Oksana, GOZHENKO, Olena, ZUKOW, Walery and POPOVYCH, Igor. Features of the HRV, endocrine and metabolic parameters in persons whose immune status is susceptible or resistant to chronic stress. Journal of Education, Health and Sport. Online. 31 March 2020. Vol. 10, no. 3, pp. 177-187. [Accessed 19 April 2025]. DOI 10.12775/JEHS.2020.10.03.020.