All the images, artworks, backgrounds, icons and any other graphic element that appears in this web page, have been selected and obtained from pages destined to that effect. All the images used had, at the time of their use, free commercial use licenses.

The following portals have been used:

http://jadknight.deviantart.com/
http://www.freepik.es/
http://www.aha-soft.com
http://www.doublejdesign.co.uk
https://www.vecteezy.com
http://freedesignfile.com