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Submitted on: 20 February 2012.
Revised on: 01 May 2012.
Accepted on: 10 June 2012.
___________________Baltic Journal of Road and Bridge Engineering
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Submitted on: 04 February 2019.
Revised on: 09 March 2019.
Accepted on: 01 May 2019.
___________________Baltic Journal of Road and Bridge Engineering
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