Submitted on: 22 September 1999.
Revised on: 04 November 1999.
Accepted on: 03 December 1999.
___________________JOURNAL OF LOW TEMPERATURE PHYSICS
Submitted on: 03 December 2000.
Revised on: 21 January 2001.
Accepted on: 01 February 2001.
___________________JOURNAL OF LOW TEMPERATURE PHYSICS
Submitted on: 27 December 2011.
Revised on: 16 April 2012.
Accepted on: 08 May 2012.
___________________JOURNAL OF LOW TEMPERATURE PHYSICS
Submitted on: 16 June 2009.
Revised on: 08 October 2009.
Accepted on: 01 November 2009.
___________________JOURNAL OF LOW TEMPERATURE PHYSICS
Submitted on: 11 October 2009.
Revised on: 26 January 2010.
Accepted on: 21 March 2010.
___________________JOURNAL OF LOW TEMPERATURE PHYSICS
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