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Submitted on: 06 September 2010.
Revised on: 21 November 2010.
Accepted on: 09 December 2010.
___________________Electronic Journal of the Faculty of Civil Engineering Osijek-e-GFOS
Submitted on: 02 March 2007.
Revised on: 20 April 2007.
Accepted on: 10 June 2007.
___________________Electronic Journal of the Faculty of Civil Engineering Osijek-e-GFOS
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Submitted on: 26 July 2020.
Revised on: 31 October 2020.
Accepted on: 16 November 2020.
___________________Electronic Journal of the Faculty of Civil Engineering Osijek-e-GFOS