By Lin C.-S.   Kroll D.E.   in European Journal of Operational Research

ISSN:0377-2217|100|3|562-565

Elsevier‎(1997)‎

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By Chang-Xue   Kroll D. E.   Li P-G.   in International Journal of Production Research

ISSN:1366-588X|38|10|2253-2272

Taylor & Francis Ltd‎(2000)‎

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