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Submitted on: 04 May 2007.
Revised on: 22 July 2007.
Accepted on: 03 August 2007.
___________________Civil Szemle---UJ MANDATUM KONYVKIADO
Submitted on: 13 October 2009.
Revised on: 22 December 2009.
Accepted on: 04 February 2010.
___________________Civil Szemle---UJ MANDATUM KONYVKIADO
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