Lakhno, I. V., and A. E. Tkachov. “FETAL HEART RATE VARIABILITY AND UMBILICAL VEIN HEMODYNAMICS IN PREGNANT WOMEN WITH PREECLAMPSIA”. The Journal of V. N. Karazin Kharkiv National University, series "Medicine"0, no. 20 (1): 40-45. Accessed May 4, 2024. https://periodicals.karazin.ua/medicine/article/view/6912.