Validation of In-vitro Deposition of Emitted Dose Method for Simultaneous Estimation of Formoterol Fumarate and Glycopyrrolate in combined Dry Powder Inhaler Aerosol Pharmaceutical Dosage Form. Int. J. Pharm. Sci. Drug Res. [Internet]. 2020 Sep. 30 [cited 2025 Jul. 13];12(5):501-8. Available from: https://ijpsdronline.com/index.php/journal/article/view/1583