D. Sudeena, S.B. Lal, and Kattamuri. Ramesh Kumar. 2017. “Profile of Bacterial Culture and Sensitivity from the Sputum of Chronic Obstructive Pulmonary Patients With Acute Exacerbations”. Asian Pacific Journal of Health Sciences 4 (1):173-82. https://doi.org/10.21276/apjhs.2017.4.1.28.