List of Articles Migration operator Open Access Article Abstract Page Full-Text 1 - Participative Biogeography-Based Optimization Abbas Salehi Behrooz Masoumi 10.22094/joie.2017.678.1435 Open Access Article Abstract Page Full-Text 2 - A modified NSGA-II solution for a new multi-objective hub maximal covering problem under uncertain shipments Amir Ebrahimi Zade Ahmad Sadegheih Mohammad Mehdi Lotfi