S. AHMAD, P. KHABIYA, T. AU, and A. RAHEMAN BAKHSHI, “QUALITY BY DESIGN APPROACH TO DEVELOP STABILITY INDICATING REVERSED-PHASE HIGH-PERFORMANCE LIQUID CHROMATOGRAPHY METHOD DEVELOPMENT FOR AMBROXOL”, Asian J Pharm Clin Res, vol. 14, no. 12, pp. 44–49, Dec. 2021.