Hi guys!
I have found this program Briss (
http://www.freewaregenius.com/2011/0...ual-interface/). You can cut a scientific article in 4 pieces, so you can read it really big (like the option of zooming of 903).
I attach the original file, the final file and a screenshot of how i put the boxes to obtain the file with the program. Hope it helps !
[MOD: removed sample files. It's not clear they're public domain]