Karki, P. K., S. Kharel, G. Khakurel, and N. Tiwari. “Effect of Air Pollutants on Peak Expiratory Flow Rate of Public Bus Drivers in Bhaktapur, Nepal”. Journal of College of Medical Sciences-Nepal, vol. 15, no. 1, Mar. 2019, pp. 30-33, doi:10.3126/jcmsn.v15i1.20753.