Abu- Monshar, A. M., Al-Bazi, A. F., & Alsalami, Q. H. (2021). On the Development of a Multi-Layered Agent-Based Heurisitc System for Vehicle Routing Problem under Random Vehicle Breakdown. Cihan University-Erbil Scientific Journal, 5(1), 1–10. https://doi.org/10.24086/cuesj.v5n1y2021.pp1-10