“Clinical Prognosis for 12 Months and Its Predictors in Patients With Chronic Heart Failure and a Reduced Left Ventricular Ejection Fraction”. Ukrainian Journal of Cardiology 26, no. 6 (February 2, 2020): 53–64. Accessed May 1, 2024. https://ucardioj.com.ua/index.php/UJC/article/view/202.