Errata

License

Articles are published under the license CC-BY-3.0 by Creative Commons, in full open-access, without any cost or fees of any kind to the author or the reader. In this scheme, the authors retain copyright and grant the journal right of first publication, allowing the free sharing of work, provided it is correctly attributed the authorship and initial publication in this journal.  Readers and end-users are allowed to copy, use, distribute, transmit and display the work publicly and to make and distribute derivative works, in any digital medium for any responsible purpose, subject to proper attribution of authorship. The authors are permitted to take on additional contracts separately for non-exclusive distribution of the version of the work published in this journal (eg, post it to an institutional repository or as a book), with an acknowledgment of its initial publication in this journal. Authors are permitted and encouraged to publish and distribute their work online (eg, in institutional repositories or on their website) as it can lead to productive exchanges, as well as increase the impact and citation of published work.