Pant, P, B Yadav, GM Khan, R Koju, R Gurung, B Pokharel, TRS Bedi, and RK Adkhari. “Role of Tiotropium in Chronic Obstructive Pulmonary Disease Exacerbation”. Journal of Institute of Medicine Nepal 32, no. 2 (June 24, 2011): 5–10. Accessed December 22, 2024. https://nepjol.info/index.php/JIOM/article/view/4937.