Authors
Natalia GENEROWICZ
Mineral and Energy Economy Research Institute of the PAS, Kraków, Poland
Joanna KULCZYCKA
AGH University of Science and Technology, Faculty of Management, Krakow, Poland
© 2021 Natalia GENEROWICZ, Joanna KULCZYCKA, published by Silesian University of Technology
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.