Vodyanytskaya, N., M. Yabluchansky, and N. Makienko. “EFFECT OF ELECTRICAL CARDIAC VERSION IN ATRIUM FIBRILLATION”. The Journal of V. N. Karazin Kharkiv National University, Series "Medicine", no. 6, 1, pp. 41-44, https://periodicals.karazin.ua/medicine/article/view/7295.