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Ondrej Stopka
Department of Transport and Logistics, Institute of Technology and Businesses in Ceske Budejovice, Okruzni 517/10, 370 01 Ceske Budejovice, Czech Republic
Ivana Simková
Department of Road and Urban Transport, The Faculty of Operation and Economics of Transport and Communications, University of Zilina, Univerzitna 1, 010 26 Zilina, Slovak Republic