eLCRPS. eLearn Center Research Paper Series is an e-journal promoted by the eLearn Center of the Universitat Oberta de Catalunya.
The texts published in this journal, unless otherwise indicated, are subject to a Creative Commons Attribution 3.0 Spain licence. They may be copied, distributed and broadcast provided that the author, the journal (eLCRPS. eLearn Center Research Paper Series), and the institution that publishes them are cited. The full licence can be consulted on http://creativecommons.org/licenses/by/3.0/es/deed.en.