List of Articles هزینه خرید Open Access Article Abstract Page Full-Text 1 - Providing mathematical model to select suppliers of production in the supply chain with the approach bee algorithm tajaddin eram Nasser fegh-hi farahmand Yaghoub Alavi Matin Open Access Article Abstract Page Full-Text 2 - Relationship between Employing a Medical Equipment Expert and the Costs of Purchasing Medical Equipment in the Units Covered by Marand Health Center fatemeh hobbi leiyla riahi Aniseh Nikravan