فهرس المقالات mathematical models حرية الوصول المقاله صفحة الملخص نص كامل 1 - Two models of inventory control with supplier selection in case of multiple sourcing: a case of Isfahan Steel Company Masood Rabieh Mohammad Ali Soukhakian Ali Naghi Mosleh Shirazi حرية الوصول المقاله صفحة الملخص نص كامل 2 - Analysis of Egg Production Curves Using Three Mathematical Models and the Variation in Egg Quality between Commercial (Hy-Line Brown) Layer Hens and Sentul Hens S.A. Santosa I. Ismoyowati D. Purwantini A. Susanto M.Y. Abare