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Submitted on: 12 June 2015.
Revised on: 24 July 2015.
Accepted on: 04 September 2015.
___________________Frontiers in Built Environment
Submitted on: 03 August 1998.
Revised on: 19 September 1998.
Accepted on: 30 September 1998.
___________________Frontiers in Built Environment
Submitted on: 28 January 2021.
Revised on: 28 February 2021.
Accepted on: 12 March 2021.
___________________Frontiers in Built Environment
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