Monogarova , Nadezhda, Ksenia Borodiy, Irina Shalaeva, and Elena Semendyaeva. “EFFECT OF SMOKING ON EXHALED CARBON MONOXIDE AND NITRIC OXIDE IN PATIENTS WITH CHRONIC OBSTRUCTIVE PULMONARY DISEASE”. Health, physical culture and sports 31, no. 3 (November 1, 2023): 54-64. Accessed October 26, 2025. https://hpcas.ru/article/view/13876.