List of Articles فردین احمدی زر Article 1 - A new mathematical model for the closed-loop supply chains considering pricing for product, a fleet of heterogeneous vehicles, and inventory costs 20.1001.1.22519904.2017.10.21.4.7 10.22094/joie.2016.258 Isa Nakhai Kamalabadi mohammad mohammadnejad Ramin sadeghian Fardin ahmadizar Journal of Optimization in Industrial Engineering , Issue 21 , Year , Spring 2017