About this article
Published Online: Dec 16, 2015
Page range: 813 - 815
DOI: https://doi.org/10.1515/jos-2015-0047
© 2015 Mariano Ruiz Espejo, published by De Gruyter Open
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.
Mariano Ruiz Espejo
Catholic University of Murcia, Avenida Jerónimos 135, 301 07 Guadalope, Murcia, Spain.