Authors
Paweł Oleksy
Cracow University of Economics, Department of Financial Markets, cracow, Poland
Andrzej Zyguła
Cracow University of Economics, Department of Financial Markets, cracow, Poland
© 2018 Paweł Oleksy, Andrzej Zyguła, published by Faculty of Economic Sciences, University of Warsaw
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.