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Submitted on: 13 January 2011.
Revised on: 10 February 2011.
Accepted on: 08 March 2011.
___________________Frontiers in Built Environment
Submitted on: 12 February 2002.
Revised on: 09 June 2002.
Accepted on: 07 August 2002.
___________________Frontiers in Built Environment
Submitted on: 09 August 2010.
Revised on: 25 September 2010.
Accepted on: 04 November 2010.
___________________Frontiers in Built Environment
Submitted on: 12 June 1999.
Revised on: 19 August 1999.
Accepted on: 17 September 1999.
___________________Frontiers in Built Environment
Submitted on: 06 May 2002.
Revised on: 26 August 2002.
Accepted on: 29 September 2002.
___________________Frontiers in Built Environment