Dimawarnita, F., K. Y. Maharani, Y. Faramitha, D. N. Kalbuadi, H. T. Prakoso, I. P. Sari, D. Prasetyo, S. Sutanto, and D. H. Goenadi. “Optimization of Fulvic Acids Production from Oil Palm Empty Fruit Bunches Using Microwave Extractor”. Menara Perkebunan, vol. 92, no. 2, Nov. 2024, pp. 141-52, doi:10.22302/iribb.jur.mp.v92i2.582.