RT Journal Article SR Electronic A1 Rovňanová, Alexandra A1 Rostášová, Mária A1 Valica, Marek T1 JF Transport And Communications YR 2016 VO 4 IS 1 SP 27 OP 31 DO 10.26552/tac.C.2016.1.6 UL https://tac.uniza.sk/artkey/tac-201601-0006.php AB