RT Journal Article SR Electronic A1 Stalmašeková, Natália A1 Genzorová, Tatiana A1 Gašperová, Lucia T1 JF Transport And Communications YR 2017 VO 5 IS 1 SP 17 OP 20 DO 10.26552/tac.C.2017.1.4 UL https://tac.uniza.sk/artkey/tac-201701-0004.php AB