Dhakal, S. S., A. Neupane, S. Chaudhary, N. Mishra, and D. B. Karki. “Utility of Bronchoalveolar Lavage in the Diagnosis of Sputum Negative Pulmonary Tuberculosis”. Journal of Universal College of Medical Sciences, vol. 8, no. 1, July 2020, pp. 19-22, doi:10.3126/jucms.v8i1.29828.