Submitted on: 01 March 2019.
Revised on: 17 March 2019.
Accepted on: 03 April 2019.
LETTERS IN MATHEMATICAL PHYSICS
Submitted on: 03 September 2005.
Revised on: 16 October 2005.
Accepted on: 09 November 2005.
LETTERS IN MATHEMATICAL PHYSICS
Submitted on: 07 June 2018.
Revised on: 04 July 2018.
Accepted on: 27 July 2018.
LETTERS IN MATHEMATICAL PHYSICS
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Submitted on: 19 August 2016.
Revised on: 03 September 2016.
Accepted on: 29 September 2016.
LETTERS IN MATHEMATICAL PHYSICS
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Submitted on: 25 June 2011.
Revised on: 04 July 2011.
Accepted on: 18 July 2011.
LETTERS IN MATHEMATICAL PHYSICS
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