Mukhajjalin, M., Mashuri, M., Willis, T. B. M. and Tirkaamiana, D. (2026) “A Multi-Period MILP Model for Multi-Origin, Multi-Echelon CPO Distribution: A Case Study of PTPN IV–PT INL”, Sinergi International Journal of Logistics, 4(3), pp. 1–12. doi: 10.61194/sijl.v4i3.1059.