RT Journal Article SR Electronic A1 Porębska, Ewelina A1 Caban, Jacek A1 Sopoćko, Mateusz T1 JF Transport And Communications YR 2015 VO 3 IS 1 SP 22 OP 25 DO 10.26552/tac.C.2015.1.5 UL https://tac.uniza.sk/artkey/tac-201501-0005.php AB