Khatri, Devendra, Parag Karki, Dhan Bahadur Shrestha, Rishi Khatri, Raj Kumar Thapa, Chiranjibi Panta, and Lee Budhathoki. “Echocardiographic Findings in Chronic Obstructive Pulmonary Disease Patients”. Birat Journal of Health Sciences 3, no. 1 (May 6, 2018): 342–345. Accessed April 30, 2024. https://www.nepjol.info/index.php/bjhs/article/view/19738.