Shafi Muhammad khuhawar, et al. “EFFECT OF BIOMASS FUEL EXPOSURE ON LUNG FUNCTION IN PATIENTS WITH CHRONIC OBSTRUCTIVE PULMONARY DISEASE”. Journal of Population Therapeutics and Clinical Pharmacology, vol. 30, no. 8, Aug. 2023, pp. 589-93, https://doi.org/10.53555/jptcp.v30i8.5143.