About this article
Published Online: Nov 12, 2017
Page range: 465 - 472
Received: May 08, 2017
Accepted: Nov 12, 2017
DOI: https://doi.org/10.21042/AMNS.2017.2.00037
Keywords
© 2017 M.L. Gandarias, M.S. Bruzón, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.
Gandarias, M.L.
Department of Mathematics, University of CádizCádiz, Spain
Bruzón, M.S.
Department of Mathematics, University of CádizCádiz, Spain