By Ramos R.M.   Alonso S.   Sicilia J.   Gonzalez C.   in European Journal of Operational Research

ISSN:0377-2217|111|3|617-628

Elsevier‎(1998)‎

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By Ramos R.M.   Ramos M.T.   Colebrook M.   Sicilia J.   in Annals of Operations Research

ISSN:0254-5330|86|1|221-235

Springer Publishing Company ‎(1999)‎

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