Viswa S, Sivasakthi K, Velsreeya Raj R, and Tamil Selvan S. “Psychological Impact of COVID-19 Lockdown on Mental Health and Behaviour”. World Journal of Pharmaceutical Sciences, vol. 9, no. 7, July 2021, pp. 6-12, https://wjpsonline.com/index.php/wjps/article/view/129.