RT Journal Article SR Electronic A1 Poliak, Miloš A1 Semanová, Štefánia A1 Varjan, Peter A1 Komačková, Lenka T1 JF Transport And Communications YR 2015 VO 3 IS 1 SP 15 OP 21 DO 10.26552/tac.C.2015.1.4 UL https://tac.uniza.sk/artkey/tac-201501-0004.php AB