Authors
Nicolás Madrid
Department of Applied Mathematics, University of Málaga, Málaga, Spain
Eloísa Ramírez-Poussa
Department of Mathematics, University of Cádiz, Cádiz, Spain
© 2020 Nicolás Madrid, Jesús Medina, Eloísa Ramírez-Poussa, published by University of Zielona Góra
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.