Authors
Iwona Foryś
Ph.D., Associate Professor University of Szczecin Faculty of Economics and Management Institute of Econometrics and Statistics Mickiewicza 64, 71-101, Szczecin, Poland
© 2018 Iwona Foryś, Radosław Gaca, published by University of Szczecin
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.