Chinju Antony. “Comparison of the Effectiveness of Inhaled Short-Acting ?2 Agonist and Anti-Cholinergic With and Without Inhaled Corticosteroid in Improving the Pulmonary Function in COPD Patients”. International Journal of Allied Medical Sciences and Clinical Research 6, no. 4 (August 11, 2020): 902–913. Accessed April 29, 2024. https://ijamscr.com/ijamscr/article/view/607.