Aziz, Ilyas Taufik Abdul, Wahyu Dita Saputri, Wega Trisunaryanti, Sri Sudiono, Akhmad Syoufian, Arief Budiman, and Karna Wijaya. 2022. “Synthesis of Nickel-Loaded Sulfated Zirconia Catalyst and Its Application for Converting Used Palm Cooking Oil to Gasoline via Hydrocracking Process”. Periodica Polytechnica Chemical Engineering 66 (1):101-13. https://doi.org/10.3311/PPch.18209.