Simpen, I Nengah, I Nyoman Suprapta Winaya, I Dewa Gede Ary Subagia, and I Wayan Budiarsa Suyasa. “Green Nano-Composite of CaO/K-Sulfated TiO2 and Its Potential As a Single-Step Reaction Solid Catalyst for Biofuel Production”. KnE Life Sciences 7, no. 3 (June 7, 2022): 382–392. Accessed April 20, 2024. https://knepublishing.com/index.php/KnE-Life/article/view/11146.