“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” (2017) The Journal of V. N. Karazin Kharkiv National University, series "Medicine", (33), pp. 40–44. doi:10.26565/2227-6505-2017-33-07.