Mulani, M. R., S. Deshmukh, S. W. Masaram, and D. Bhave. “A Study of Vitamin C, Superoxide Dismutase and FEV1/FVC Ratio in Chronic Obstructive Pulmonary Disease”. International Journal of Research in Medical Sciences, vol. 12, no. 1, Dec. 2023, pp. 159-63, doi:10.18203/2320-6012.ijrms20233992.