Bombushkar, I., A. Gozhenko, M. Korda, X. Żukow, and I. Popovych. “Relationships Between Plasma Levels of Nitrogenous Metabolites and Some Psycho-Neuro-Endocrine Parameters”. Journal of Education, Health and Sport, vol. 12, no. 6, June 2022, pp. 365-83, doi:10.12775/JEHS.2022.12.06.036.