C. B. Khadka, “Health Impact of Tailpipe Emission: An Empirical Study with Reference to Central Development Region of Nepal”, Econ J Dev Issues, vol. 9, pp. 1–20, Jun. 2010, Accessed: Jul. 16, 2026. [Online]. Available: https://www.nepjol.info/index.php/EJDI/article/view/3287