Submitted on: 27 March 2017.
Revised on: 04 April 2017.
Accepted on: 18 April 2017.
NULL
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Submitted on: 16 June 2003.
Revised on: 12 July 2003.
Accepted on: 05 August 2003.
NULL
Submitted on: 13 March 2022.
Revised on: 08 April 2022.
Accepted on: 23 April 2022.
NULL
Submitted on: 10 June 2014.
Revised on: 19 June 2014.
Accepted on: 01 July 2014.
Sustainable Futures---ELSEVIER
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http://reply.papertrans.cn/3/291/29072/29072-17.png
http://reply.papertrans.cn/3/291/29072/29072-18.png
Submitted on: 17 December 2009.
Revised on: 28 December 2009.
Accepted on: 14 January 2010.
NULL
Submitted on: 10 November 2018.
Revised on: 06 December 2018.
Accepted on: 26 December 2018.
Sustainable Futures---ELSEVIER