Submitted on: 18 July 2005.
Revised on: 19 September 2005.
Accepted on: 14 October 2005.
___________________ADVANCES IN PHYSICS---TAYLOR & FRANCIS LTD
Submitted on: 03 January 2010.
Revised on: 02 March 2010.
Accepted on: 07 April 2010.
___________________ADVANCES IN PHYSICS---TAYLOR & FRANCIS LTD
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Submitted on: 12 June 2001.
Revised on: 04 October 2001.
Accepted on: 30 November 2001.
___________________ADVANCES IN PHYSICS---TAYLOR & FRANCIS LTD
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Submitted on: 14 August 2004.
Revised on: 29 October 2004.
Accepted on: 04 December 2004.
___________________ADVANCES IN PHYSICS---TAYLOR & FRANCIS LTD
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Submitted on: 03 December 2021.
Revised on: 27 February 2022.
Accepted on: 21 April 2022.
___________________ADVANCES IN PHYSICS---TAYLOR & FRANCIS LTD
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