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Submitted on: 20 November 2007.
Revised on: 01 December 2007.
Accepted on: 08 December 2007.
PHYSICS TODAY
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Submitted on: 07 February 2002.
Revised on: 19 February 2002.
Accepted on: 25 February 2002.
PHYSICS TODAY
Submitted on: 16 February 1998.
Revised on: 24 February 1998.
Accepted on: 07 March 1998.
PHYSICS TODAY---AMER INST PHYSICS
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Submitted on: 01 December 2022.
Revised on: 10 December 2022.
Accepted on: 24 December 2022.
PHYSICS TODAY
Submitted on: 27 July 2005.
Revised on: 01 September 2005.
Accepted on: 27 September 2005.
PHYSICS TODAY