ŠTOFA, Tomáš - DŽUPKA, Peter - DRÁB, Radovan. Comparison of Operational Costs for Fixed-Route Bus Service and Demand Responsive Transport Systems. The Case of Kosice Region - Slovakia. In Communications : Scientific Letters of the University of Zilina. - Žilina : EDIS, University Publishing House, University of Žilina, 2023. ISSN 1335-4205, 2023, vol. 25, no. 1, pp. A61-A72.