A. Agrawal, U. Garg, C. Madan, and S. goel, “Association Of Biomass Fuel Smoke Exposure And COPD In Women Of Rural India – A Cross Sectional Hospital Based Study: Association of Biomass Fuel Smoke”, Natl J Integr Res Med, vol. 4, no. 6, pp. 11–17, Dec. 2013.