A. Yas, Ali, Yehia I. Khalil, and Mohamed S. Mohamed. “Response Surface Methodology for Development and Optimization of Theophylline Pulmonary Delivery System”. Iraqi Journal of Pharmaceutical Sciences 22, no. 1 (March 28, 2017): 65–81. Accessed November 5, 2024. https://bijps.uobaghdad.edu.iq/index.php/bijps/article/view/425.