Yoga W. Wardhana and Mulyadi G. Tedjasaputra 2011. INFLUENCE OF HYDROXYPROPIL METHYLCELULLOSEAND PECTIN MATRIX ON THE SOLUBILITY PROFILE AND CRYSTAL STABILITY OF THEOPHYLLINE. Jurnal Sains Materi Indonesia. 12, 2 (Feb. 2011), 141–144. DOI:https://doi.org/10.17146/jsmi.2011.12.2.4605.