1. NBR 11597;ABNT, Brazilian Association of Technical Standards,1997
2. NBR ISO 289-1;ABNT, Brazilian Association of Technical Standards,2010
3. NBR ISO 2007;ABNT, Brazilian Association of Technical Standards,2010
4. NBR ISO 2930;ABNT, Brazilian Association of Technical Standards,2010
5. NBR ISO 2000;ABNT, Brazilian Association of Technical Standards,2010