Environmental Assessment and Congestion for DMUs With Undesirable Outputs
Subject Areas : International Journal of Industrial MathematicsM. ‎Khodadadi‎ 1 , H. Zare Haghighi 2
                                               1 -     Department  of  Mathematics, Urmia Branch, Islamic Azad University,  Urmia, Iran.
                                               
                                               2 -     Department  of  Mathematics, Urmia Branch, Islamic Azad University,  Urmia, Iran.
                                               
                                       
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