Harpreet Kaur Gandhoke, Dr, Dr Vasanti Lagali Jirge, and Dr Anjana Bagewadi. “Assessment and Comparison of the Levels of N-Nitrosonornicotine and 4-(n-Methyl-N –nitrosamino) -1-(3-Pyridyl)-1-Butanone in the Saliva of Tobacco Chewers and Non- Chewers -a Hospital Based Study”. International Journal of Dental Research 6, no. 2 (September 10, 2018): 66–74. Accessed April 27, 2024. https://www.sciencepubco.com/index.php/IJDR/article/view/11943.