Saputri, D. R. dan Purwanto, W. W. (2018) “Synthesis of Ni/CaO-γ-Al2O3@Ru Core Shell via Micro-Emulsion Method for Bio-oil Steam Reforming of Empty Fruit Bunch”, 18(1), hlm. 44-52. Tersedia pada: https://journal.ugm.ac.id/v3/AJChE/article/view/9013 (Diakses: 8Juni2025).