* [http://www.printworks.net.au/documents/paper_spec.pdf]
 * [http://www.mle.org.hu/dokumentumok/64.pdf]
 * [http://www.lindenmeyr.com/lindenmeyrBook/tools/LBook_GradeCompChrt.pdf]
 * [http://www.papercatalog.com/pc/brands/results.asp?CName=&Mode=2&Page=2&oby=&ltr=E&boid= papercatalog.com : Catalogue en ligne]