فهرس المقالات Nirjhar Roy المقاله 1 - Development of a novel lot sizing model with variable lead time in supply chain environment 20.1001.1.22519904.2017.10.22.3.8 10.22094/joie.2017.275 Jitendra Kumar Nirjhar Roy Ali Mostafaeipour Mojtaba Qolipour Journal of Optimization in Industrial Engineering , العدد 22 , السنة 10 , پاییز 2017
