Mustikaningrum, M., M. E. Yulianto, and L. Prasakti. “Comparative Study of Maceration and Ultrasonic Techniques in Coffee Oil Extraction Based on Energy Evaluation and Mass Transfer Value”. CHEESA: Chemical Engineering Research Articles, vol. 7, no. 1, Aug. 2024, pp. 47-56, doi:10.25273/cheesa.v7i1.19326.47-56.