Submitted on: 13 January 2001.
Revised on: 06 March 2001.
Accepted on: 23 April 2001.
___________________COMMUNICATIONS IN STATISTICS-THEORY AND METHODS
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Submitted on: 22 August 2018.
Revised on: 19 December 2018.
Accepted on: 14 January 2019.
___________________COMMUNICATIONS IN STATISTICS-THEORY AND METHODS
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Submitted on: 15 April 2001.
Revised on: 11 May 2001.
Accepted on: 05 June 2001.
___________________COMMUNICATIONS IN STATISTICS-THEORY AND METHODS
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Submitted on: 19 October 2004.
Revised on: 28 December 2004.
Accepted on: 16 February 2005.
___________________COMMUNICATIONS IN STATISTICS-THEORY AND METHODS