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Submitted on: 11 October 2000.
Revised on: 30 December 2000.
Accepted on: 25 February 2001.
___________________JOURNAL OF LOW TEMPERATURE PHYSICS
Submitted on: 13 September 2024.
Revised on: 15 December 2024.
Accepted on: 22 January 2025.
___________________JOURNAL OF LOW TEMPERATURE PHYSICS
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Submitted on: 15 May 2007.
Revised on: 26 August 2007.
Accepted on: 06 September 2007.
___________________JOURNAL OF LOW TEMPERATURE PHYSICS
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