Mehta, Gargi Chauhan, et al. “A Comparative Study of the Effect on Mental Health in Young, Middle and Older Adults Recovered from COVID-19”. International Journal of Research in Engineering, Science and Management, vol. 5, no. 10, Oct. 2022, pp. 51-54, https://journal.ijresm.com/index.php/ijresm/article/view/2388.