Authors
Eugeniusz.Kwiatkowski@pw.edu.pl
College of Economics and Social Sciences, Warsaw University of Technology, Poland
Eugeniusz.Kwiatkowski@pw.edu.pl
© 2022 Eugeniusz Kwiatkowski, Agata Szymańska, published by Poznań University of Economics and Business Press
This work is licensed under the Creative Commons Attribution 4.0 License.