Asanov, E. O., Holubova, Y. I., Dyba, I. A., & Asanova, S. O. (2021). Breathing exercises with PEEP: efficiency and duration for correcting the cardiovascular system functional state in older patients with COPD. Zaporozhye Medical Journal, 23(6), 806–812. https://doi.org/10.14739/2310-1210.2021.6.231350