Literatura
- http://www.unze.ba/am/pzi - http://www.unze.ba/am/rg - http://www.ncd.matf.bg.ac.yu/casopis/02/d003/document.htm - http://www.carnet.hr/nesto/referalni/obrazovni/imme/optimizacija/graf1 - http://webstyleguide.com/graphics/graphics/7.17.gif - http://farm4.static.flickr.com/3155/2332774904_46bfee676d_o.png - http://content.answers.com/main/content/wp/en-commons/thumb/4/41/300px-Posterization_example.jpg - http://img.photobucket.com/albums/v232/scrapmum/blog-Dec05/VP-before-after.jpg - http://www.dustylens.com/Wyoming-before-after-1.jpg
