Golwalkar, J. K., A. V. Shivpuje, S. V. Khandekar, R. S. Patil, and M. Chahal. “Study on Etiology and Clinical Profile of Pleural Effusion”. International Journal of Health and Clinical Research, vol. 3, no. 8, Nov. 2020, pp. 11-15, https://ijhcr.com/index.php/ijhcr/article/view/293.