Khapung, A., G. N. Rao, and S. Shrestha. “Reasons and Patterns of Permanent Teeth Loss Among Patients Attending a Dental College in Kathmandu”. Journal of Nepalese Society of Periodontology and Oral Implantology, vol. 4, no. 1, Aug. 2020, pp. 10-13, doi:10.3126/jnspoi.v4i1.30896.