Submitted on: 04 May 2002.
Revised on: 02 June 2002.
Accepted on: 21 July 2002.
___________________AIP Advances---AIP PUBLISHING
Submitted on: 10 March 2017.
Revised on: 15 May 2017.
Accepted on: 10 June 2017.
___________________AIP Advances---AIP PUBLISHING
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Submitted on: 28 April 2002.
Revised on: 12 August 2002.
Accepted on: 29 September 2002.
___________________AIP Advances---AIP PUBLISHING
Submitted on: 20 September 2013.
Revised on: 09 November 2013.
Accepted on: 04 January 2014.
___________________AIP Advances---AIP PUBLISHING
Submitted on: 10 August 2008.
Revised on: 02 September 2008.
Accepted on: 16 October 2008.
___________________AIP Advances---AIP PUBLISHING