T. V. Zolotarova, M. S. Brynza, O. V. Martynenko, and D. E. Volkov, “TYPES OF RADIOFREQUENCY ABLATION AND CLINICAL SYMPTOMS IN PATIENTS WITH ATRIAL FIBRILLATION AND FLUTTER”, J. V. N. Karazin Khark. Nat. Univ., Ser. Med., no. 34, pp. 51-56, Dec. 2017.