RT Journal Article SR Electronic A1 Synák, František A1 Rievaj, Vladimír T1 JF Transport And Communications YR 2017 VO 5 IS 1 SP 21 OP 23 DO 10.26552/tac.C.2017.1.5 UL https://tac.uniza.sk/artkey/tac-201701-0005.php AB