For citations:
Kurpаtov I.G., Geltser B.I., Kotelnikov V.N., Kinyaykin M.F. Functional State of Respiratory Muscles in Patients with Chronic Obstructive Pulmonary Disease. Tuberculosis and Lung Diseases. 2021;99(6):15-21. (In Russ.) https://doi.org/10.21292/2075-1230-2021-99-6-15-21