Authors
Natalia Iwaszczuk
AGH University of Science and Technology, Cracow, Poland
Oleksandr Ivashchuk
Cracow University of Technology, Cracow, Poland
© 2018 Bartosz Łamasz, Natalia Iwaszczuk, Oleksandr Ivashchuk, published by Warsaw School of Economics
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.