Badritdinova Matluba Najmidinovna and Fayzullayev Tillo Togaymurodovich, “Study of the Features of Systolic Function of the Left Ventricle of Patients with Chronic Heart Failure in Combination with Chronic Obstructive Pulmonary Disease”, IJIMM, vol. 2, no. 12, pp. 75–77, Dec. 2024.