Submitted on: 02 August 2014.
Revised on: 05 November 2014.
Accepted on: 11 December 2014.
___________________EURO Journal on Transportation and Logistics
Submitted on: 29 July 2018.
Revised on: 04 November 2018.
Accepted on: 21 December 2018.
___________________EURO Journal on Transportation and Logistics
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Submitted on: 08 September 2001.
Revised on: 05 December 2001.
Accepted on: 12 January 2002.
___________________EURO Journal on Transportation and Logistics
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Submitted on: 23 December 2007.
Revised on: 31 March 2008.
Accepted on: 15 May 2008.
___________________EURO Journal on Transportation and Logistics
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Submitted on: 04 June 1999.
Revised on: 02 October 1999.
Accepted on: 29 October 1999.
___________________EURO Journal on Transportation and Logistics