Authors
Wiktor Cwynar
University of Economics and Innovation, Lublin, Poland
Robert Pater
University of Information Technology and Management, Rzeszów, Poland
© 2018 Andrzej Cwynar, Wiktor Cwynar, Robert Pater, Piotr Kaźmierkiewicz, published by University of Information Technology and Management in Rzeszow
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.