About this article
Published Online: Jan 01, 2022
Page range: 1 - 8
Received: Oct 12, 2020
DOI: https://doi.org/10.2478/tmmp-2021-0001
Keywords
© 2021 Mathematical Institute, Slovak Academy of Sciences
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Nowakowski, Piotr
Institute of Mathematics, Łódź University of TechnologyŁódź, POLAND
Institute of Mathematics, Czech Academy of SciencesPrague, CZECH REPUBLIC