RT Journal Article SR Electronic A1 Harantová, Veronika A1 Kalašová, Alica A1 Čulík, Kristián A1 Otahálová, Zuzana T1 JF Transport And Communications YR 2019 VO 7 IS 1 SP 21 OP 25 DO 10.26552/tac.C.2019.1.5 UL https://tac.uniza.sk/artkey/tac-201901-0005.php AB