Submitted on: 05 July 2004.
Revised on: 01 November 2004.
Accepted on: 25 December 2004.
___________________JOURNAL OF THE OPERATIONAL RESEARCH SOCIETY
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Submitted on: 28 October 2016.
Revised on: 22 February 2017.
Accepted on: 16 April 2017.
___________________JOURNAL OF THE OPERATIONAL RESEARCH SOCIETY
Submitted on: 09 April 2013.
Revised on: 02 May 2013.
Accepted on: 28 May 2013.
___________________JOURNAL OF THE OPERATIONAL RESEARCH SOCIETY
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Submitted on: 25 June 2008.
Revised on: 10 September 2008.
Accepted on: 21 September 2008.
___________________JOURNAL OF THE OPERATIONAL RESEARCH SOCIETY
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Submitted on: 08 November 2002.
Revised on: 19 February 2003.
Accepted on: 08 April 2003.
___________________JOURNAL OF THE OPERATIONAL RESEARCH SOCIETY