Nigar, S. ., S. . Hassan, S. . Fahim, A. B. . Khalid, and F. . Salim. “Correlation Between Clinical Oral Dryness Score and Salivary Flow Rates in Active and Passive Smokers”. Journal of Bahria University Medical and Dental College, vol. 10, no. 2, Mar. 2021, pp. 120-3, doi:10.51985/JBUMDC2019116.