RT Journal Article SR Electronic A1 Poliak, Miloš A1 Semanová, Štefánia A1 Komačková, Lenka A1 Mrníková, Michaela T1 JF Transport And Communications YR 2015 VO 3 IS 2 SP 12 OP 16 DO 10.26552/tac.C.2015.2.3 UL https://tac.uniza.sk/artkey/tac-201502-0003.php AB