Authors
University of Lodz, Faculty of Management, Department of Marketing, Łódź, Poland
emilian.gwiazdzinski@uni.lodz.pl
University of Lodz, Faculty of Management, Department of Marketing, Poland
emilian.gwiazdzinski@uni.lodz.pl
© 2020 Bogdan Gregor, Emilian Gwiaździński, published by ŁUKASIEWICZ RESEARCH NETWORK – INSTITUTE OF AVIATION
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.