TYMOSHENKO, O. S.; YABLUCHANSKY, M. I. DINAMICS OF BLOOD PRESSURE AND HEART RATE VARIABILITY PARAMETERS DURING BIOFEEDBACK IN LOOP OF HEART RATE VARIABILITY AND PACED BREATHING IN PATIENTS WITH DIFFICULT-TO-CONTROL ARTERIAL HYPERTENSION ON THE BACKGROUND OF DRUG. The Journal of V. N. Karazin Kharkiv National University, series "Medicine", n. 33, p. 40-44, 11 Sep. 2017.