Submitted on: 05 June 1999.
Revised on: 25 August 1999.
Accepted on: 15 October 1999.
___________________INTERNATIONAL JOURNAL OF PHOTOENERGY
Submitted on: 08 June 2003.
Revised on: 19 August 2003.
Accepted on: 11 September 2003.
___________________INTERNATIONAL JOURNAL OF PHOTOENERGY
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Submitted on: 15 February 2018.
Revised on: 29 April 2018.
Accepted on: 05 June 2018.
___________________INTERNATIONAL JOURNAL OF PHOTOENERGY
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