Copyright (c) 2013 J. C. González Hidalgo, J. R. Sánchez-Montahud, J. Bellot Abad

This work is licensed under a Creative Commons Attribution 4.0 International License.
© Universidad de La Rioja, 2013
ISSN 0211-6820
EISSN 1697-9540
© Universidad de La Rioja, 2013
ISSN 0211-6820
EISSN 1697-9540