Yabluchansky, N.I., and L.A. Martimyanova. 1. “CLASSIFICATION OF ATRIAL FIBRILATION OR ATRIAL FLЕTTER ORIENTATED FOR PRACTICAL DOCTOR”. The Journal of V. N. Karazin Kharkiv National University, Series "Medicine", no. 4 (1), 6-11. https://periodicals.karazin.ua/medicine/article/view/7338.