Ahmad, S. ., S. . Goswami, S. . Mishra, A. . Chaudhary, R. . Karmakar, and D. . Verma. “Hooked on Smartphones: Smartphone Usage Pattern and Related Health Risks Among Medical Students in a Tertiary Centre at Kolkata”. National Journal of Community Medicine, vol. 9, no. 06, June 2018, pp. 402-6, https://njcmindia.com/index.php/file/article/view/727.