Submitted on: 20 March 1998.
Revised on: 08 May 1998.
Accepted on: 06 June 1998.
___________________Acta Mechanica et Automatica---SCIENDO
Submitted on: 09 October 2002.
Revised on: 16 December 2002.
Accepted on: 13 February 2003.
___________________Acta Mechanica et Automatica---SCIENDO
Submitted on: 20 May 2013.
Revised on: 25 July 2013.
Accepted on: 25 August 2013.
___________________Acta Mechanica et Automatica---SCIENDO
Submitted on: 04 May 2004.
Revised on: 29 May 2004.
Accepted on: 18 June 2004.
___________________Acta Mechanica et Automatica---SCIENDO
Submitted on: 22 May 2001.
Revised on: 06 September 2001.
Accepted on: 29 September 2001.
___________________Acta Mechanica et Automatica---SCIENDO
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Submitted on: 29 January 2023.
Revised on: 26 March 2023.
Accepted on: 09 April 2023.
___________________Acta Mechanica et Automatica---SCIENDO
Submitted on: 06 November 2012.
Revised on: 29 December 2012.
Accepted on: 25 January 2013.
___________________Acta Mechanica et Automatica---SCIENDO
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