Upadhyay, S. ., S. . Paudyal, P. . Khatiwada, B. . Khanal, and R. . Shrestha. “Estimation of Dental Age by Demirjian and Willems Method in a Tertiary Care Hospital of Nepal”. Orthodontic Journal of Nepal, vol. 11, no. 1, Aug. 2021, pp. 40-45, doi:10.3126/ojn.v11i1.39084.