“Clinical Efficiency and Safety of Ethacizine in Patients With Symptomatic Ventricular Extrasystoles Without Severe Structural Damage of the Myocardium”. Ukrainian Journal of Cardiology, no. 4 (September 8, 2017): 90–99. Accessed May 3, 2024. https://ucardioj.com.ua/index.php/UJC/article/view/129.