Submitted on: 09 November 2014.
Revised on: 02 February 2015.
Accepted on: 26 March 2015.
___________________Energy---PERGAMON-ELSEVIER SCIENCE LTD
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Submitted on: 24 December 2015.
Revised on: 22 February 2016.
Accepted on: 22 April 2016.
___________________Energy---PERGAMON-ELSEVIER SCIENCE LTD
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Submitted on: 08 July 1998.
Revised on: 12 August 1998.
Accepted on: 01 October 1998.
___________________Energy---PERGAMON-ELSEVIER SCIENCE LTD
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