Lutsyk, M. V., N. I. Nesterenko, N. E. Tselik, and L. O. Martymianova. “THE FIRST CASE OF ATRIAL FIBRILLATION: APPROACH ISSUES”. The Journal of V. N. Karazin Kharkiv National University, series "Medicine"0, no. 33 (September 11, 2017): 71-75. Accessed October 22, 2021. https://periodicals.karazin.ua/medicine/article/view/9145.