Submitted on: 22 June 2002.
Revised on: 06 September 2002.
Accepted on: 21 September 2002.
___________________INTERNATIONAL JOURNAL OF MODERN PHYSICS E
Submitted on: 16 December 2016.
Revised on: 09 January 2017.
Accepted on: 21 January 2017.
___________________INTERNATIONAL JOURNAL OF MODERN PHYSICS E
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Submitted on: 06 March 2020.
Revised on: 30 May 2020.
Accepted on: 13 June 2020.
___________________INTERNATIONAL JOURNAL OF MODERN PHYSICS E
Submitted on: 11 April 2005.
Revised on: 18 May 2005.
Accepted on: 20 June 2005.
___________________INTERNATIONAL JOURNAL OF MODERN PHYSICS E
Submitted on: 28 September 2015.
Revised on: 28 December 2015.
Accepted on: 20 February 2016.
___________________INTERNATIONAL JOURNAL OF MODERN PHYSICS E
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Submitted on: 08 January 2007.
Revised on: 02 May 2007.
Accepted on: 15 May 2007.
___________________INTERNATIONAL JOURNAL OF MODERN PHYSICS E