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Submitted on: 03 September 2008.
Revised on: 17 November 2008.
Accepted on: 06 December 2008.
___________________Archives of Civil Engineering---POLISH ACAD SCIENCES
Submitted on: 07 March 2016.
Revised on: 02 April 2016.
Accepted on: 29 May 2016.
___________________Archives of Civil Engineering---POLISH ACAD SCIENCES
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Submitted on: 05 May 2008.
Revised on: 19 August 2008.
Accepted on: 12 September 2008.
___________________Archives of Civil Engineering---POLISH ACAD SCIENCES
Submitted on: 07 July 2018.
Revised on: 21 August 2018.
Accepted on: 06 September 2018.
___________________Archives of Civil Engineering---POLISH ACAD SCIENCES