Dongol, Deveshree, et al. “Assessment of Metered Dose Inhalation Technique in Patients With Chronic Lung Disease at a Tertiary Health Care Center”. Journal of Patan Academy of Health Sciences, vol. 10, no. 2, Nov. 2023, pp. 12-19, https://jpahs.edu.np/index.php/jpahs/article/view/354.