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Submitted on: 15 October 2006.
Revised on: 23 November 2006.
Accepted on: 15 January 2007.
___________________JOURNAL OF GEOMETRY AND PHYSICS
Submitted on: 18 October 2012.
Revised on: 13 November 2012.
Accepted on: 07 December 2012.
___________________JOURNAL OF GEOMETRY AND PHYSICS
Submitted on: 23 April 2024.
Revised on: 14 May 2024.
Accepted on: 10 July 2024.
___________________JOURNAL OF GEOMETRY AND PHYSICS
Submitted on: 23 February 2006.
Revised on: 01 June 2006.
Accepted on: 06 July 2006.
___________________JOURNAL OF GEOMETRY AND PHYSICS
Submitted on: 14 July 2012.
Revised on: 23 October 2012.
Accepted on: 17 December 2012.
___________________JOURNAL OF GEOMETRY AND PHYSICS
Submitted on: 17 September 2001.
Revised on: 09 December 2001.
Accepted on: 14 January 2002.
___________________JOURNAL OF GEOMETRY AND PHYSICS
Submitted on: 24 July 2006.
Revised on: 06 October 2006.
Accepted on: 12 November 2006.
___________________JOURNAL OF GEOMETRY AND PHYSICS
Submitted on: 04 September 2019.
Revised on: 11 November 2019.
Accepted on: 14 December 2019.
___________________JOURNAL OF GEOMETRY AND PHYSICS