By Zhang C.   Wan Y.-w.   Liu J.   Linn R.J.   in Transportation Research Part B: Methodological

ISSN:0191-2615|36|6|537-555

Elsevier‎(2002)‎

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By Lau K. M.   Hui Y. V.   Wan Y. W.   in Production Planning and Control

ISSN:1366-5871|8|2|173-178

Taylor & Francis Ltd‎(1997)‎

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