Authors
Pedro González-Rodríguez
Department of Mathematics, Carlos III University of Madrid, Spain
Diego Álvarez
Department of Mathematics, Carlos III University of Madrid, Spain
© 2022 Manuel Kindelan, Pedro González-Rodríguez, Diego Álvarez, published by University of Zielona Góra
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.