www.fogra.org :Fogra Asociation. Graphic Technology research.

www.eci.org : European color iniciative

www.densitometros.com : Information about the color measurement in graphic industry.

www.color.org : International Color Standard (ICC).

www.gusgsm.com : Notes about digital image and graphic design.

www.brucelindbloom.com : Utilities.

http://era.eu.org : European Rotogravure Association.