Nidhi Yadav, Richa Srivastav, Nisha Yadav, Anurag Yadav, and Shubhangi Goel, “To study the effect of COVID -19 pandemic on sleep and mental health in population”, Int. J. Heal. Clin. Res., vol. 4, no. 22, pp. 273–278, Dec. 2021.