Zainol, Muzakkir Mohammad, Mohamad Nor Fitri Roslan, Mohd Asmadi, and Nor Aishah Saidina Amin. “Preparation and Characterization of Sulfonated Carbon Cryogel Doped Zinc As a Catalyst for Glucose Ethanolysis to Ethyl Levulinate”. ASEAN Journal of Chemical Engineering 21, no. 1 (June 30, 2021): 1-10. Accessed July 17, 2024. https://journal.ugm.ac.id/v3/AJChE/article/view/9142.