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Submitted on: 27 June 2015.
Revised on: 20 July 2015.
Accepted on: 28 August 2015.
___________________Infrastructure Asset Management
Submitted on: 05 April 1999.
Revised on: 31 May 1999.
Accepted on: 23 June 1999.
___________________Infrastructure Asset Management
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Submitted on: 17 August 2007.
Revised on: 02 October 2007.
Accepted on: 13 October 2007.
___________________Infrastructure Asset Management