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Submitted on: 27 July 2009.
Revised on: 21 August 2009.
Accepted on: 14 September 2009.
___________________Journal of Electrical Engineering-Elektrotechnicky Casopis
Submitted on: 27 July 2016.
Revised on: 23 November 2016.
Accepted on: 12 January 2017.
___________________Journal of Electrical Engineering-Elektrotechnicky Casopis
Submitted on: 29 September 2009.
Revised on: 24 November 2009.
Accepted on: 19 December 2009.
___________________Journal of Electrical Engineering-Elektrotechnicky Casopis
Submitted on: 24 February 2014.
Revised on: 01 June 2014.
Accepted on: 14 June 2014.
___________________Journal of Electrical Engineering-Elektrotechnicky Casopis
Submitted on: 21 October 2001.
Revised on: 20 November 2001.
Accepted on: 08 December 2001.
___________________Journal of Electrical Engineering-Elektrotechnicky Casopis
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Submitted on: 05 October 2009.
Revised on: 02 January 2010.
Accepted on: 27 January 2010.
___________________Journal of Electrical Engineering-Elektrotechnicky Casopis
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