Authors
István Blahota
Institute of Mathematics and Computer Sciences, University of Nyíregyháza, Hungary
György Gát
Institute of Mathematics, University of Debrecen, Debrecen, Hungary
© 2023 István Blahota, György Gát, published by Sapientia Hungarian University of Transylvania
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.