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Submitted on: 16 September 2002.
Revised on: 28 November 2002.
Accepted on: 13 January 2003.
___________________Advanced Sustainable Systems---WILEY-V C H VERLAG GMBH
Submitted on: 01 July 1999.
Revised on: 20 September 1999.
Accepted on: 22 October 1999.
___________________Advanced Sustainable Systems---WILEY-V C H VERLAG GMBH
Submitted on: 13 January 2011.
Revised on: 14 February 2011.
Accepted on: 06 April 2011.
___________________Advanced Sustainable Systems---WILEY-V C H VERLAG GMBH
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Submitted on: 27 March 2007.
Revised on: 08 July 2007.
Accepted on: 10 August 2007.
___________________Advanced Sustainable Systems---WILEY-V C H VERLAG GMBH