Pandey, Tilchan, Jeevan Khanal, Resham Gautam, and Shami Pokhrel. “Study of Electrocardiographic Changes and Spirometry Findings in Chronic Obstructive Lung Disease”. Journal of Nepalgunj Medical College 21, no. 1 (September 1, 2023): 40–44. Accessed November 23, 2024. https://nepjol.info./index.php/JNGMC/article/view/58298.