Authors
Justyna Zalewska
Faculty of Economic Sciences, University of Warsaw, Warsaw, Poland
Natalia Nehrebecka
Faculty of Economic Sciences, University of Warsaw, Warsaw, Poland
© 2020 Justyna Zalewska, Natalia Nehrebecka, published by Faculty of Economic Sciences, University of Warsaw
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.