List of Articles NP-Complete Open Access Article Abstract Page Full-Text 1 - An Imperialist Competitive Algorithm and a Mixed Integer Programming Formulation for the Capacitated Vehicle Routing Problem M. Yousefikhoshbakht Open Access Article Abstract Page Full-Text 2 - Optimizing of Open Vehicle Routing Problem by Using an Efficient Hybrid Meta-heuristic Algorithm Majid Yousefi khoshbakht Hassan Zarie Zahra Sadati Eskandari Narges Mahmmudi Daranie Ahmad Mahmmud Janlo