Copyright (c) 2013 Maria Teresa Rico-Herrero, Carlos Sancho-Marcén, María Concepción Arenas-Abad, Marta Vázquez-Urbez, Blas Lorenzo Valero-Garcés

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This work is licensed under a Creative Commons Attribution 4.0 International License.

© Universidad de La Rioja, 2013

ISSN 0211-6820

EISSN 1697-9540