By Suneja S.K.   Aggarwal S.   Davar S.   in European Journal of Operational Research

ISSN:0377-2217|141|3|471-479

Elsevier‎(2002)‎

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By Suneja S.K.   Aggarwal S.   Davar S.   in Journal of Optimization Theory and Applications

ISSN:0022-3239|106|2|399-410

Springer Publishing Company ‎(2000)‎

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