O. S. Tymoshenko, M. I. Yabluchansky, and O. V. Bilchenko, “THE FREQUENCY OF USE OF COMBINATIONS OF ANTIHYPERTENSIVE DRUGS IN PATIENTS WITH DIFFICULT-TO-CONTROL HYPERTENSION ON THE BACKGROUND OF BIOFEEDBACK AND PACED BREATHING AND HEART RATE VARIABILITY”, J. V. N. Karazin Khark. Nat. Univ., Ser. Med., no. 35, Jun. 2018.