“REGULATORY SYSTEMS AT SINUS TACHYCARDIA: HEART RATE VARIABILITY AND SINUS TACHYCARDIA AT PARAINFLUENZA (I+II+III)”. The Journal of V. N. Karazin Kharkiv National University, Series "Medicine", no. 2, July 2015, pp. 23-28, https://periodicals.karazin.ua/medicine/article/view/7428.