TominаО. E., O. Y. Bichkova, G. M. Fomych, O. O. Ivleva, OhriamkinaО. O., and N. Y. Usan. “HEART RATE VARIABILITY IN PATIENTS WITH HYPERTENSION, COMORBID WITH PEPTIC ULCER DISEASE, TAKING INTO ACCOUNT CIRCADIAN SYSTOLIC BLOOD PRESSURE”. The Journal of V. N. Karazin Kharkiv National University, Series "Medicine", no. 24, 1, pp. 52-62, https://periodicals.karazin.ua/medicine/article/view/6709.