Reproducing this material
The author's philosophy is that art and ideas should be shared freely. That is why he offers all his works for free in this website. All the works presented here can be reproduced free of charge, either by means of printers or photocopiers, according to the license Creative Commons BY-ND. The only requirement is to acknowledge the author and mention the source. Roberto Perez-Franco reserves his copyrights on his works, but invites you to use them freely.