Hanga, A. J., I. N. Mir, M. M. Ahmad, W. Raja, and S. Aleem. “Prevalence of Chronic Obstructive Pulmonary Disease Among Adults in Kashmir (North India): A Population Based Study”. International Journal Of Community Medicine And Public Health, vol. 5, no. 12, Nov. 2018, pp. 5284-9, doi:10.18203/2394-6040.ijcmph20184804.