Stychynskyi, O. S., A. V. Topchii, and P. O. Almiz. “Substrate Modification in Catheter Treatment of Atrial Fibrillation”. Ukrainian Journal of Cardiovascular Surgery, no. 3 (44), Sept. 2021, pp. 76-79, doi:10.30702/ujcvs/21.4409/s.t.043-76-79.