Mannan, M. A., M. A. Kashem, F. R. Mohammed, R. Rabbani, and M. M. Islam. “Microbiological Profile of Severe Lower Respiratory Tract Infection in Intensive Care Unit of a Tertiary Care Center of Dhaka, Bangladesh”. Bangladesh Critical Care Journal, vol. 2, no. 2, July 2015, pp. 53-56, doi:10.3329/bccj.v2i2.24077.