Submitted on: 19 April 2002.
Revised on: 29 May 2002.
Accepted on: 21 June 2002.
MODERN PHYSICS LETTERS B---WORLD SCIENTIFIC PUBL CO PTE LTD
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Submitted on: 01 March 2016.
Revised on: 23 March 2016.
Accepted on: 16 April 2016.
MODERN PHYSICS LETTERS B---WORLD SCIENTIFIC PUBL CO PTE LTD
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Submitted on: 04 July 2007.
Revised on: 08 August 2007.
Accepted on: 19 August 2007.
MODERN PHYSICS LETTERS B
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Submitted on: 23 May 2015.
Revised on: 09 June 2015.
Accepted on: 15 June 2015.
MODERN PHYSICS LETTERS B