1. Austrian Federal Ministry for the Environment, Youth and Family, 1999. Textile chemicals in Austria. Part 2: textile dyes (in German).
2. BGA (Bundesministerium für Gesundheit), 1994. Second amendment to the German Consumer Goods Ordinance. Bundesgesundheitsblatt, Part 1, p. 1670.
3. Coop, 2003. Coop Naturaline. Minimal requirements for clothing textiles. Switzerland.
4. Council of Europe, 2008. Resolution ResAP (2008) 1 on requirements and criteria for the safety of tattoos and permanent make-up. Adopted by the Committee of Ministers on 20 February 2008 at the 1018th meeting of the Minister’s Deputies.
5. CSTEE (Scientific Committee on Toxicity, Ecotoxicity and the Environment), 1999. Opinion on risk of cancer caused by textiles and leather goods coloured with azo-dyes. In: CSTEE Plenary Meeting, Brussels, 18 January 1999. .