Rakhimova D.A., Tilloeva Sh.Sh., and Bokieva Ch.Sh. “Current Perspectives on Exacerbations of Chronic Obstructive Pulmonary Disease During the Covid-19 Pandemic (Literature Review)”. Central Asian Journal of Medical and Natural Science, Vol. 4, no. 2, Mar. 2023, pp. 203-18, https://cajmns.centralasianstudies.org/index.php/CAJMNS/article/view/1398.