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Submitted on: 25 December 2009.
Revised on: 18 February 2010.
Accepted on: 13 March 2010.
___________________Control Theory and Technology---SPRINGER MEDIZIN VERLAG GMBH
Submitted on: 27 July 2000.
Revised on: 31 October 2000.
Accepted on: 04 December 2000.
___________________Control Theory and Technology---SPRINGER MEDIZIN VERLAG GMBH
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Submitted on: 05 September 2001.
Revised on: 15 October 2001.
Accepted on: 25 November 2001.
___________________Control Theory and Technology---SPRINGER MEDIZIN VERLAG GMBH
Submitted on: 31 July 2002.
Revised on: 12 November 2002.
Accepted on: 05 January 2003.
___________________Control Theory and Technology---SPRINGER MEDIZIN VERLAG GMBH
Submitted on: 27 March 2002.
Revised on: 27 June 2002.
Accepted on: 04 August 2002.
___________________Control Theory and Technology---SPRINGER MEDIZIN VERLAG GMBH
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