Submitted on: 08 August 2018.
Revised on: 02 October 2018.
Accepted on: 16 October 2018.
___________________Construction Management and Economics
Submitted on: 05 August 2006.
Revised on: 08 November 2006.
Accepted on: 08 December 2006.
___________________Construction Management and Economics
Submitted on: 06 August 2002.
Revised on: 21 September 2002.
Accepted on: 27 October 2002.
___________________Construction Management and Economics
Submitted on: 23 December 2003.
Revised on: 31 January 2004.
Accepted on: 10 March 2004.
___________________Construction Management and Economics
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