Sheikh, Saniya, Amaila Fazal, and Faizan Mirza. “Psychophysiological Effects of Gum Chewing on Cognitive Performance: A Gender-Based Comparative Study”. Annals of Psychophysiology 7 (October 1, 2020): 19-24. Accessed March 7, 2021. http://aeirc-edu.com/ojs14/index.php/app/article/view/496.