By Martzoukos S.H.   in Annals of Operations Research

ISSN:0254-5330|99|1-4|305-323

Springer Publishing Company ‎(2000)‎

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By Martzoukos S.H.   Trigeorgis L.   in European Journal of Operational Research

ISSN:0377-2217|136|3|696-706

Elsevier‎(2002)‎

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