Kalashnykova, O. S. “Cardio-Vascular Risk in Patients With Non-Valvular Persisting Atrial Fibrillation”. Medicni perspektivi 18, no. 2 (July 30, 2013): 40–45. Accessed April 26, 2025. https://journals.uran.ua/index.php/2307-0404/article/view/15946.