About this article
Published Online: Dec 31, 2020
Page range: 43 - 52
Received: Apr 14, 2020
DOI: https://doi.org/10.2478/tmmp-2020-0031
Keywords
© 2020 Milan Paštéka, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.
Paštéka, Milan
Department of Mathematics and Informatics Faculty of Education University of Trnava, Institute of Mathematics Slovak Academy of Sciences BratislavaSlovakia