Agrawal, P., T. M. Shrestha, P. N. Prasad, R. P. Aacharya, and P. Gupta. “Pleural Fluid Serum Bilirubin Ratio for Differentiating Exudative and Transudative Effusions”. Journal of Nepal Medical Association, vol. 56, no. 211, June 2018, pp. 662-5, doi:10.31729/jnma.3569.