. J. . Monika, S. D. . Raj, N. J. . Beera, and D. Jhansi, “Diagnostic utility of pleural fluid/serum bilirubin ratio versus light’s criteria in differentiating exudative and transudative pleural effusions. A cross-sectional observational study.”, SJHR-Africa, vol. 6, no. 9, p. 10, Sep. 2025.