R. Nagaraju, and Rajesh Kaza. “Formulation and Evaluation of Bilayer Sustained Release Tablets of Salbutamol and Theophylline”. International Journal of Pharmaceutical Sciences and Nanotechnology(IJPSN) 2, no. 3 (November 30, 2009): 638–646. Accessed November 22, 2024. https://ijpsnonline.com/index.php/ijpsn/article/view/632.