By Aneja Y.P.   Punnen A.P.   in European Journal of Operational Research

ISSN:0377-2217|112|1|167-173

Elsevier‎(1999)‎

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By Ahuja R.K.   Batra J.L.   Gupta S.K.   Punnen A.P.   in European Journal of Operational Research

ISSN:0377-2217|89|1|176-184

Elsevier‎(1996)‎

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