Reddy, M. Ramakrishna, and Sasikanth Reddy Polu. “Acute Exacerbation of Chronic Obstructive Pulmonary Disease: Predictors of Outcome: Single Center Prospective Study from India”. International Journal of Advances in Medicine 3, no. 1 (January 5, 2017): 20–24. Accessed October 18, 2025. https://www.ijmedicine.com/index.php/ijam/article/view/223.