Patel, Nolesh, et al. “OUTCOME OF PATIENTS PRESENTED WITH ACUTE EXACERBATION OF COPD TO EMERGENCY DEPARTMENT OF A TERTIARY CARE HOSPITAL”. INDIAN JOURNAL OF APPLIED-BASIC MEDICAL SCIENCES, vol. 12, no. 1, Feb. 2023, pp. 47-55, https://doi.org/10.26860/eg3xkc94.