“REGULATORY SYSTEMS AT SINUS TACHYCARDIA: HEART RATE VARIABILITY AND SINUS TACHYCARDIA AT PARAINFLUENZA (I+II+III)”, J. V. N. Karazin Khark. Nat. Univ., Ser. Med., no. 2, pp. 23–28, Jul. 2015, Accessed: Oct. 25, 2026. Available: https://periodicals.karazin.ua/medicine/article/view/7428