1. EC (European Commission). 1989 Report of the Scientific Committee for Animal Nutrition on the use of Astaxanthin in feedingstuffs for salmon and trout ec.europa.eu/food/fs/sc/oldcomm6/other/01_en.pdf
2. EC (European Commission). 2002 Report of the Scientific Committee for Animal Nutrition on the use of Astaxanthin-rich Phaffia rhodozyma in feedingstuffs for salmon and trout ec.europa.eu/food/fs/sc/scan/out76_en.pdf
3. EC (European Commission). 2003 Update of the opinion of the Scientific Committee on Animal Nutrition on the use of Astaxanthin-rich Phaffia rhodozyma in feedingstuffs for salmon and trout ec.europa.eu/food/fs/sc/scan/out111_en.pdf
4. EFSA (European Food Safety Authority). 2004 Opinion of the Scientific Panel on Additives and Products or Substances used in Animal Feed on environmental impact of Astaxanthin-rich Phaffia rhodozyma (Ecotone®) as feed additive in accordance with Council Directive 70/524/EEC www.efsa.eu.int/science/feedap/feedap_opinions/366_en.html