فهرست مقالات Location-Allocation Problems دسترسی آزاد مقاله صفحه چکیده متن کامل 1 - Developing a New Bi-Objective Functions Model for a Hierarchical Location-Allocation Problem Using the Queuing Theory and Mathematical Programming Parham Azimi Abulfazl Asadollahi 10.22094/joie.2018.350.0