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Submitted on: 25 May 2000.
Revised on: 14 June 2000.
Accepted on: 01 August 2000.
___________________JOURNAL OF GEOMETRY AND PHYSICS
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Submitted on: 14 November 2014.
Revised on: 12 January 2015.
Accepted on: 24 January 2015.
___________________JOURNAL OF GEOMETRY AND PHYSICS
Submitted on: 15 November 2021.
Revised on: 31 December 2021.
Accepted on: 17 February 2022.
___________________JOURNAL OF GEOMETRY AND PHYSICS
Submitted on: 31 December 2022.
Revised on: 04 February 2023.
Accepted on: 18 February 2023.
___________________JOURNAL OF GEOMETRY AND PHYSICS
Submitted on: 15 August 2019.
Revised on: 06 November 2019.
Accepted on: 21 November 2019.
___________________JOURNAL OF GEOMETRY AND PHYSICS
Submitted on: 26 September 2002.
Revised on: 16 December 2002.
Accepted on: 01 January 2003.
___________________JOURNAL OF GEOMETRY AND PHYSICS
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Submitted on: 30 December 2022.
Revised on: 07 February 2023.
Accepted on: 06 March 2023.
___________________JOURNAL OF GEOMETRY AND PHYSICS