“RESPIRATORY SINUS ARRHYTHMIA (RSA): NONINVASIVE MEASURE OF PARASYMPATHETIC CARDIAC CONTROL IN NEWLY DIAGNOSED HYPERTENSIVES AND THE INFLUENCE OF ABDOMINAL BREATHING”. 2015. The Journal of V. N. Karazin Kharkiv National University, Series "Medicine", no. 3 (July): 80-85. https://periodicals.karazin.ua/medicine/article/view/7382.