Authors
andrzej.hanusik@ue.katowice.pl
Department of Transport, Faculty of Economy, University of Economics in Katowice, Katowice, Poland
Department of Transport, Faculty of Economy, University of Economics in Katowice, Katowice, Poland
andrzej.hanusik@ue.katowice.pl
© 2021 Andrzej Hanusik, Anna Woźnica, published by University of Economics in Katowice
This work is licensed under the Creative Commons Attribution-NonCommercial 4.0 License.