Aryal, Umesh Raj, Keshab Deuba, Arjun Subedi, Rachana Shrestha, and Laxmi Bhatta. 2011. “Prevalence and Determinants of Cigarette Smoking Among the College Students of Kathmandu Valley”. Asian Journal of Medical Sciences 1 (2):53-58. https://nepjol.info./index.php/AJMS/article/view/3279.