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Submitted on: 27 August 2006.
Revised on: 28 September 2006.
Accepted on: 27 November 2006.
___________________Civil Engineering Journal-Stavebni Obzor
Submitted on: 18 July 2008.
Revised on: 17 August 2008.
Accepted on: 07 October 2008.
___________________Civil Engineering Journal-Stavebni Obzor
Submitted on: 12 December 2001.
Revised on: 27 January 2002.
Accepted on: 25 February 2002.
___________________Civil Engineering Journal-Stavebni Obzor
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