R. K. Sah, D. Bhatta, G. Ghimire, B. Kandel, B. Tiwari, and J. Sherchand, “Evaluation of Nitrate Reductase Assay for Rapid Detection of Drug Resistant Tuberculosis”, SAARC J. Tuber. Lung Dis. HIV/AIDS, vol. 9, no. 2, pp. 4–8, Apr. 2013.