About this article
Published Online: Nov 03, 2016
Page range: 517 - 528
Received: Sep 11, 2016
Accepted: Nov 03, 2016
DOI: https://doi.org/10.21042/AMNS.2016.2.00041
Keywords
© 2016 Jorge Delgado, Juan Manuel Peña, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.
Delgado, Jorge
Departamento de Matemática Aplicada, Universidad de Zaragoza, Escuela Universitaria Politécnica de TeruelTeruel, Spain
Manuel Peña, Juan
Departamento de Matemática Aplicada, Universidad de Zaragoza, Escuela Universitaria Politécnica de TeruelTeruel, Spain