Apu, A.S., Pathan, A.H., Kibria, G. and Jalil, R.- ul 2010. <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, 1 (Jun. 2010), 1–6. DOI:https://doi.org/10.3329/dujps.v8i1.5328.