فهرس المقالات cost product حرية الوصول المقاله صفحة الملخص نص كامل 1 - The Analysis of Iran Cotton Producers’ Risk Degree Based on Non-Linear Mean-Standard Deviation Model ابراهیم مرادی اسماء عبداللهی درمیان حرية الوصول المقاله صفحة الملخص نص كامل 2 - Joint pricing and production management: a geometric programming approach with consideration of cubic production cost function Seyed Jafar Sadjadi Aghil Hamidi Hesarsorkh Mehdi Mohammadi Ali Bonyadi Naeini