Devkota, K. C., S. Hamal, and P. Panta. “Comparison of Heffner Criteria and Light Criteria in Differentiating Exudative and Transudative Pleural Effusion”. Nepal Medical College Journal, vol. 22, no. 3, Nov. 2020, pp. 141-5, doi:10.3126/nmcj.v22i3.32638.