Facile Synthesis of Silane-Modified Mixed Metal Oxide as Catalyst in Transesterification Processes oleh Nugroho Pranyoto, Yuni Dewi Susanti, Immanuel Joseph Ondang, Artik Elisa Angkawijaya, Felycia Edi Soetaredjo, Shella Permatasari Santoso, Maria Yuliana, Suryadi Ismadji, Sandy Budi Hartono