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Submitted on: 31 December 2016.
Revised on: 26 January 2017.
Accepted on: 25 February 2017.
___________________Environmental and Sustainability Indicators
Submitted on: 11 December 2014.
Revised on: 07 April 2015.
Accepted on: 21 May 2015.
___________________Environmental and Sustainability Indicators
Submitted on: 15 February 2020.
Revised on: 12 June 2020.
Accepted on: 24 July 2020.
___________________Environmental and Sustainability Indicators
Submitted on: 25 October 2003.
Revised on: 27 December 2003.
Accepted on: 07 February 2004.
___________________Environmental and Sustainability Indicators
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Submitted on: 08 December 2000.
Revised on: 27 January 2001.
Accepted on: 13 February 2001.
___________________Environmental and Sustainability Indicators
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