Authors
Martha Lorena Avendaño-Garrido
Faculty of Mathematics, University of Veracruz, Mexico
© 2021 Adriana Laura López-Lobato, Martha Lorena Avendaño-Garrido, published by University of Zielona Góra
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.