salman, salman, Kurniawan Sinaga, Meutia Indriana, Yessi Febriani, and Zulfikar Zulfikar. “Effect of Aspergillus Oryzae Fermentation of Coffee Husk Flour With Two Different Amounts of Urea and Ammonium Sulfate on the Reduction of Crude Fiber”. Journal of Pharmaceutical and Sciences 6, no. 1 (January 7, 2023): 167–177. Accessed March 29, 2024. https://journal-jps.com/new/index.php/jps/article/view/47.