Sayami, M., S. Baral, R. Shrestha, and D. B. Karki. “Prevalence of Chronic Cor Pulmonale in Chronic Obstructive Pulmonary Disease Patients in a Teaching Hospital in Nepal”. Journal of Institute of Medicine Nepal, vol. 41, no. 1, Apr. 2019, pp. 15-19, https://nepjol.info/index.php/JIOM/article/view/28586.