Dumatar, D. C., and D. J. Chauhan. “A Study of the Effect of Cigarette Smoking On Cognitive Parameters In Human Volunteers: Effect of Cigarette Smoking On Cognitive Parameters”. National Journal of Integrated Research in Medicine, vol. 2, no. 3, Sept. 2011, pp. 66-71, http://nicpd.ac.in/ojs-/index.php/njirm/article/view/1924.