Prologue

License

Until 2024 we use the Creative Commons Attribution/NonCommercial Attribution 4.0 International License https://creativecommons.org/licenses/by-nc/4.0/deed.es. Which states that: you are free to share, copy and redistribute the material in any medium or format, as well as to adapt, remix, transform and build upon the material. Under the following terms:

Attribution: you must give proper credit , provide a link to the license, and indicate if changes have been made . You may do so in any reasonable manner, but not in such a way as to suggest that you or your use is endorsed by the licensor.
NonCommercial: you may not use the material for commercial purposes.

As of 2025 authors retain their copyright and assign to the journal the right of first publication of their work, which shall simultaneously be subject to the license https://creativecommons.org/licenses/by-nc-sa/4.0/deed.es that permits sharing, copying and redistribution of the material in any medium or format provided that initial publication in this journal is indicated. Adapt, remix, transform and build upon the material. If you remix, transform, or build from the material, you must distribute your contribution under the same license as the original and may not make use of the material for commercial purposes.

Under the following terms:

1. Attribution: you must give proper credit, provide a link to the license, and indicate whether changes have been made. You may do so in any reasonable manner, but not in such a way as to suggest that you or your use is endorsed by the licensor.

2. NonCommercial: you may not use the material for commercial purposes.

3. ShareAlike: if you remix, transform or build upon the material, you must distribute your contribution under the same license as the original.