About this article
Published Online: Feb 01, 2019
Page range: 717 - 721
Received: Dec 29, 2017
Accepted: Mar 22, 2018
DOI: https://doi.org/10.2478/msp-2018-0087
Keywords
© 2018 Piotr Potera et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.
Potera, Piotr
Faculty of Mathematics and Natural Sciences, University of RzeszowRzeszow, Poland
Wisz, Grzegorz
Faculty of Mathematics and Natural Sciences, University of RzeszowRzeszow, Poland
Szyller, Łukasz
Faculty of Mathematics and Natural Sciences, University of RzeszowRzeszow, Poland