PT Journal AU Halaj, D SO Doprava a spoje PY 2012 BP 104 EP 110 VL 8 IS 1 WP https://tac.uniza.sk/artkey/das-201201-0011.php SN 13367676 AB The article is focused on the costs associated with the use of services of information system of Blue & Me Fleet. The carrier pays various monthly fees, depending on the levels of services of the information system. ER