Submitted on: 25 September 1999.
Revised on: 30 November 1999.
Accepted on: 10 January 2000.
___________________Energy---PERGAMON-ELSEVIER SCIENCE LTD
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Submitted on: 18 September 2021.
Revised on: 30 October 2021.
Accepted on: 07 December 2021.
___________________Energy---PERGAMON-ELSEVIER SCIENCE LTD
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Submitted on: 04 January 2000.
Revised on: 27 March 2000.
Accepted on: 27 April 2000.
___________________Energy---PERGAMON-ELSEVIER SCIENCE LTD
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Submitted on: 17 February 2014.
Revised on: 04 June 2014.
Accepted on: 02 July 2014.
___________________Energy---PERGAMON-ELSEVIER SCIENCE LTD