Saputra, H., A. Azrifirwan, and F. Firdani. “Evaluation of Vegetable Oil Extraction Methods on Crude Oil Yields in Indonesia. Systematic Literature Review”. GreenTech, vol. 1, no. 1, May 2024, pp. 107-1, http://greentech.fateta.unand.ac.id/index.php/GreenTech/article/view/10.