Submitted on: 02 November 1998.
Revised on: 15 November 1998.
Accepted on: 25 November 1998.
MODERN PHYSICS LETTERS A
http://reply.papertrans.cn/3/222/22156/22156-32.png
Submitted on: 13 December 2001.
Revised on: 13 January 2002.
Accepted on: 05 February 2002.
MODERN PHYSICS LETTERS A---WORLD SCIENTIFIC PUBL CO PTE LTD
Submitted on: 23 October 2004.
Revised on: 05 December 2004.
Accepted on: 12 December 2004.
MODERN PHYSICS LETTERS A
Submitted on: 25 October 2012.
Revised on: 17 November 2012.
Accepted on: 06 December 2012.
MODERN PHYSICS LETTERS A---WORLD SCIENTIFIC PUBL CO PTE LTD
Submitted on: 09 September 2012.
Revised on: 23 September 2012.
Accepted on: 09 October 2012.
MODERN PHYSICS LETTERS A