A. V. Kovchun, V. V. Kmyta, A. N. Bondarkova, and L. N. Prystupa. 2020. “DEVELOPMENT MECHANISMS AND CLINICAL SIGNIFICANCE OF ANEMIA IN PATIENTS WITH CHRONIC OBSTRUCTIVE PULMONARY DISEASE”. Eastern Ukrainian Medical Journal 6 (4), 359–370. https://eumj.med.sumdu.edu.ua/index.php/journal/article/view/103.