Ranjith Raj VPRB, Karthik Ganesh Mohanraj, and Murugan Thamaraiselvan. “Association Between Smoking and Obstructive Sleep Apnea in Adult and Aged Male Population – A Survey Based Study”. International Journal of Research in Pharmaceutical Sciences, vol. 11, no. (SPL 3), Sept. 2020, pp. 31-38, https://ijrps.com/home/article/view/2320.