Authors
Paula Catarino
Department of Mathematics, University of Trás-os-Montes e Alto Douro, Portugal
Department of Mathematics, University of Trás-os-Montes e Alto Douro, Portugal
© 2022 Paula Catarino, Sandra Ricardo, published by University of Silesia in Katowice, Institute of Mathematics
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.