List of Articles Queuing Model Open Access Article Abstract Page Full-Text 1 - A new multi-mode and multi-product hub covering problem: A priority M/M/c queue approach S. Sedehzadeh‎ R. Tavakkoli-‎Moghaddam‎‎ F. Jolai‎ Open Access Article Abstract Page Full-Text 2 - 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 Open Access Article Abstract Page Full-Text 3 - Architecture and Performance of Satellite Configurations in Different Orbits Pedram Hajipour