Submitted on: 19 May 2011.
Revised on: 21 June 2011.
Accepted on: 05 August 2011.
___________________International Journal of Sustainable Transportation
Submitted on: 03 March 2006.
Revised on: 06 May 2006.
Accepted on: 27 June 2006.
___________________International Journal of Sustainable Transportation
Submitted on: 03 February 2012.
Revised on: 08 April 2012.
Accepted on: 27 April 2012.
___________________International Journal of Sustainable Transportation
Submitted on: 24 March 2011.
Revised on: 05 July 2011.
Accepted on: 06 August 2011.
___________________International Journal of Sustainable Transportation
Submitted on: 09 July 1998.
Revised on: 05 September 1998.
Accepted on: 09 October 1998.
___________________International Journal of Sustainable Transportation
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http://reply.papertrans.cn/2/142/14197/14197-17.png
Submitted on: 21 April 2000.
Revised on: 18 July 2000.
Accepted on: 15 September 2000.
___________________International Journal of Sustainable Transportation
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Submitted on: 21 June 2009.
Revised on: 18 September 2009.
Accepted on: 04 October 2009.
___________________International Journal of Sustainable Transportation