Ahasan, H. N., K. Ayaz, A. Hossain, M. Rashid, and R. A. Chowdhury. “Extensively Drug-Resistant Tuberculosis(XDR-TB)”. Journal of Medicine, vol. 10, no. 2, July 2009, pp. 97-99, doi:10.3329/jom.v10i2.2823.