Tymoshenko, O. S.; Yabluchansky, M. I.; Martynenko, O. V. CHARACTERISTIC OF PARAMETERS OF HEART RATE VARIABILITY IN PATIENTS WITH DIFFICULT-TO-CONTROL AND CONTROLLED ARTERIAL HYPERTENSION. J. V. N. Karazin Khark. Nat. Univ., Ser. Med. 2017, 47-50.