P. Mandal, S. Basnyat, D. Khadka, and D. Bhatta, “Evaluation of Nitrate Reductase Assay (NRA) for rapid detection of druc resistant tuberculosis at National Tuberculosis Centre, Nepal”, SAARC J. Tuber. Lung Dis. HIV/AIDS, vol. 7, no. 1, pp. 26–30, Nov. 2010.