N. Singh, N. P. Singh, P. Kharya, S. Shukla, V. Singh, and D. Raj Singh, “Whatsapp addiction: assessing pattern of Whatsapp usage and its impact on medical students at U.P.U.M.S., Saifai, Etawah, India”, Int J Community Med Public Health, vol. 6, no. 6, pp. 2505–2509, May 2019.