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Submitted on: 07 March 2010.
Revised on: 26 June 2010.
Accepted on: 13 August 2010.
___________________AStA-Advances in Statistical Analysis
Submitted on: 15 February 2012.
Revised on: 18 March 2012.
Accepted on: 12 May 2012.
___________________AStA-Advances in Statistical Analysis
Submitted on: 05 October 2011.
Revised on: 29 January 2012.
Accepted on: 21 February 2012.
___________________AStA-Advances in Statistical Analysis
Submitted on: 23 February 2006.
Revised on: 05 June 2006.
Accepted on: 16 July 2006.
___________________AStA-Advances in Statistical Analysis
Submitted on: 12 April 2009.
Revised on: 03 June 2009.
Accepted on: 20 June 2009.
___________________AStA-Advances in Statistical Analysis
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Submitted on: 08 August 2011.
Revised on: 25 November 2011.
Accepted on: 06 January 2012.
___________________AStA-Advances in Statistical Analysis
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