Gunadi, Felix Arya, Dharma Lesmono, and Kinley Aritonang. “A Routing Model for Hybrid Hub-and-Spoke With Time Windows”. Jurnal Teknik Industri 21, no. 1 (February 29, 2020): 22–33. Accessed June 5, 2026. https://ejournal.umm.ac.id/index.php/industri/article/view/8986.