Parajuli, Angana, et al. “A Study of Clinical Presentation, Precipitating Factors, and Predictors of Severity Among Patients With Acute Exacerbation of COPD Attending the Emergency Department of a Tertiary Care Center”. Journal of Gandaki Medical College-Nepal, vol. 19, no. 1, July 2026, pp. 18-22, doi:10.3126/jgmc-n.v19i1.92595.