Imobilisasi asam bronsted dan lewis pada SiO2: Karakterisasi dan uji katalisis terhadap esterifikasi asam-4-hidroksibenzoat dengan sukrosa = Immobilization of bronsted and lewis acid on SiO2: Characterization and catalytic application for esteritication of 4-Hydroxybenzoic acid with sucrose - Iman Abdullah, author (Universitas Indonesia, 2010)