Submitted on: 16 October 2002.
Revised on: 15 November 2002.
Accepted on: 25 December 2002.
___________________ENERGY CONVERSION AND MANAGEMENT
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Submitted on: 07 January 2017.
Revised on: 20 April 2017.
Accepted on: 30 May 2017.
___________________ENERGY CONVERSION AND MANAGEMENT
Submitted on: 21 July 2009.
Revised on: 15 August 2009.
Accepted on: 09 October 2009.
___________________ENERGY CONVERSION AND MANAGEMENT