Silalahi FTR, Simatupang TM, Siallagan M. Optimal Design for Biodiesel Supply Chain: Case Study . SPEE [Internet]. 2023 Jan. 17 [cited 2026 Jun. 19];39(1-2):65-92. Available from: https://journals.riverpublishers.com/index.php/SPEE/article/view/19475