Wachyudi, Tedy, Arief Daryanto, Mahfud, and Yandra Arkeman. “Supply Chain Risk Mapping and Analysis: A FMEA Implementation on Biofuel Downstream Supply Chain”. Asian Journal of Applied Sciences 6, no. 6 (December 20, 2018). Accessed January 17, 2022. https://ajouronline.com/index.php/AJAS/article/view/5648.