The works published in this journal are subject to the following terms:

1. The University of Oviedo Publications Service (the publisher) retains the economic rights (copyright) of the published works, and favours and allows their reuse under the use license indicated in point 2.

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2. The works are published in the electronic edition of the journal under a Creative Commons Non-Commercial-Recognition-NonDerrivedWork 3.0 Spain (legal text). They may be copied, used, disseminated, transmitted and publicly exposed, provided that: i) the authorship and original source of their publication (journal, editorial and URL of the work) are cited; ii) they are not used for commercial purposes; iii) the existence and specifications of this use license are mentioned.

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