Authors
Pavel Fobel
Silesian University of Technology, University of Matej Bel, Banská Bystrica
© 2019 Pavel Fobel, Tomáš Forgon, Monika Klimentová Fobelová, published by STE Group sp. z.o.o.
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.