Dahal, S., P. Poudel, and S. Adhikari. “Nicotine Dependence and Periodontal Status Among Tobacco Users in a Dental Hospital of Kathmandu Valley”. Journal of Nepalese Society of Periodontology and Oral Implantology, vol. 4, no. 2, Dec. 2020, pp. 78-82, doi:10.3126/jnspoi.v4i2.34235.