RT Journal Article SR Electronic A1 Klieštik, Tomáš A1 Birtus, Miloš T1 JF Transport And Communications YR 2013 VO 1 IS 1 SP 15 OP 20 DO 10.26552/tac.C.2013.1.4 UL https://tac.uniza.sk/artkey/tac-201301-0004.php AB