List of Articles Lexicographic Open Access Article Abstract Page Full-Text 1 - Using lexicographic parametric programming for identifying efficient hyperpalnes in DEA Farhad Hosseinzadeh Lotfi F. Rezai Balf A. Taghavi Open Access Article Abstract Page Full-Text 2 - Obtaining a Unique Solution for the Cross Efficiency by Using the Lexicographic method G. R. Jahanshahloo R. Fallahnejad