Kalyan, Meenakshi, Shubhangi A. Kanitkar, Aayush Gupta, Devanshi Sharma, and Sanam Singh. “Effect of Passive Smoking As a Risk Factor for Chronic Obstructive Pulmonary Disease in Normal Healthy Women”. International Journal of Research in Medical Sciences 4, no. 11 (December 19, 2016): 4970–4973. Accessed October 12, 2025. https://www.msjonline.org/index.php/ijrms/article/view/259.