List of Articles Pattern Search Open Access Article Abstract Page Full-Text 1 - A multi-product, multi-period model to select supplier for deteriorating products while considering uncertainty as well as backorder Mohsen Lashgari Seyed Jafar Sadjadi Misugh Sahihi Open Access Article Abstract Page Full-Text 2 - INTRODUCTION AND DEVELOPMENT OF SURROGATE MANAGEMENT FRAMEWORK FOR SOLVING OPTIMIZATION PROBLEMS B. Azarkhalili M. Rasouli P. Moghadas B. Mehri