Bondarenko, I.A. “THE RELATION BETWEEN CLINICAL SIGNS, PARAMETERS OF HEART RATE VARIABILITY AND FUNCTION OF EXTERNAL BREATHING IN THE PATIENT WITH CHRONIC OBSTRUCTIVE PULMONARY DISEASE BEFORE AND AFTER THERAPY”. The Journal of V. N. Karazin Kharkiv National University, series "Medicine"0, no. 11 (1): 58-62. Accessed March 28, 2024. https://periodicals.karazin.ua/medicine/article/view/7147.