Upreti , Y. R. ., and D. Acharya. “Premarital Sexual Behaviours Among Secondary School Adolescents: A Cross-Sectional Study in Kathmandu”. Journal of Health Promotion, vol. 8, no. 1, Dec. 2020, pp. 39-52, http://nepalhean.org/journal/index.php/jhp/article/view/44.