About this article
Published Online: Oct 08, 2019
Page range: 26 - 33
Received: May 05, 2019
Accepted: May 29, 2019
DOI: https://doi.org/10.2478/cqpi-2019-0004
Keywords
© 2019 Szczepaniak Waldemar, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.
Waldemar, Szczepaniak
Czestochowa University of TechnologyPoland