RT Journal Article SR Electronic A1 Wolak-Tuzimek, Anna A1 Noworol-Luft, Elżbieta A1 Luft, Radosław T1 JF Transport And Communications YR 2014 VO 2 IS 2 SP 17 OP 20 DO 10.26552/tac.C.2014.2.4 UL https://tac.uniza.sk/artkey/tac-201402-0004.php AB