Submitted on: 19 July 2000.
Revised on: 17 October 2000.
Accepted on: 30 October 2000.
___________________EURO Journal on Transportation and Logistics
Submitted on: 01 March 2002.
Revised on: 15 May 2002.
Accepted on: 19 June 2002.
___________________EURO Journal on Transportation and Logistics
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Submitted on: 12 August 2010.
Revised on: 06 December 2010.
Accepted on: 29 December 2010.
___________________EURO Journal on Transportation and Logistics
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Submitted on: 01 February 2002.
Revised on: 06 April 2002.
Accepted on: 18 May 2002.
___________________EURO Journal on Transportation and Logistics
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Submitted on: 22 June 2013.
Revised on: 17 September 2013.
Accepted on: 03 October 2013.
___________________EURO Journal on Transportation and Logistics
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