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Submitted on: 04 August 2002.
Revised on: 25 October 2002.
Accepted on: 20 November 2002.
___________________International Journal of Systems Science-Operations & Logistics
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Submitted on: 04 April 2005.
Revised on: 26 April 2005.
Accepted on: 22 June 2005.
___________________International Journal of Systems Science-Operations & Logistics
Submitted on: 23 November 2009.
Revised on: 13 December 2009.
Accepted on: 11 January 2010.
___________________International Journal of Systems Science-Operations & Logistics
Submitted on: 12 January 2010.
Revised on: 05 March 2010.
Accepted on: 19 April 2010.
___________________International Journal of Systems Science-Operations & Logistics
Submitted on: 30 August 2006.
Revised on: 20 November 2006.
Accepted on: 18 January 2007.
___________________International Journal of Systems Science-Operations & Logistics
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Submitted on: 25 May 1999.
Revised on: 19 August 1999.
Accepted on: 28 September 1999.
___________________International Journal of Systems Science-Operations & Logistics