A. Yas A, I. Khalil Y, S. Mohamed M. Response Surface Methodology for Development and Optimization of Theophylline Pulmonary Delivery System. Iraqi Journal of Pharmaceutical Sciences [Internet]. 2017 Mar. 28 [cited 2024 Dec. 11];22(1):65-81. Available from: https://bijps.uobaghdad.edu.iq/index.php/bijps/article/view/425