Tsoy, Ye.G., L.N. Igisheva, and A.R. Galeev. “HRV IN EVALUATION OF PROCESSES OF ADAPTATION IN NEWBORNS”. The Journal of V. N. Karazin Kharkiv National University, series "Medicine"0, no. 3 (1): 45-50. Accessed July 18, 2024. https://periodicals.karazin.ua/medicine/article/view/7378.