Apu, Apurba Sarker, Atiqul Haque Pathan, Golam Kibria, and Reza-ul Jalil. “<i>In vitro</I> Release Kinetic Study of Theophylline from Eudragit RS PO and Eudragit RL PO Matrix Tablets”. Dhaka University Journal of Pharmaceutical Sciences 8, no. 1 (June 25, 2010): 1–6. Accessed December 7, 2021. https://www.banglajol.info/index.php/JPharma/article/view/5328.