Submitted on: 27 February 1999.
Revised on: 10 May 1999.
Accepted on: 26 May 1999.
___________________FLUCTUATION AND NOISE LETTERS---WORLD SCIENTIFIC PUBL CO PTE LTD
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Submitted on: 12 March 1998.
Revised on: 28 May 1998.
Accepted on: 05 July 1998.
___________________FLUCTUATION AND NOISE LETTERS---WORLD SCIENTIFIC PUBL CO PTE LTD
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