Submitted on: 15 March 2015.
Revised on: 29 April 2015.
Accepted on: 23 May 2015.
___________________IEEE ELECTRICAL INSULATION MAGAZINE
Submitted on: 07 July 2009.
Revised on: 03 October 2009.
Accepted on: 20 November 2009.
___________________IEEE ELECTRICAL INSULATION MAGAZINE
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Submitted on: 27 November 1998.
Revised on: 27 December 1998.
Accepted on: 28 January 1999.
___________________IEEE ELECTRICAL INSULATION MAGAZINE
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Submitted on: 29 August 1999.
Revised on: 17 November 1999.
Accepted on: 07 January 2000.
___________________IEEE ELECTRICAL INSULATION MAGAZINE
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