1. EC (European Commission) 1996 Opinion of the Scientific Committee on Animal Nutrition on the use of certain enzymes in animal feedingstuffs ec.europa.eu/food/fs/sc/scan/out96_en.pdf
2. EC (European Commission) 2002 Opinion of the Scientific Committee on Animal Nutrition on the safety of the enzymatic product Roxazyme ® G2 for use as feed additive in laying hens and piglets ec.europa.eu/food/fs/sc/scan/out87_en.pdf
3. Opinion of the Scientific Panel on Additives and Products or Substances used in Animal Feed on the safety of the enzyme preparation Roxazyme® G2 (liquid and granular) for use as feed additive for ducks;EFSA (European Food Safety Authority);The EFSA Journal 2005,2005
4. JECFA (Joint FAO/WHO Expert Committee on Food Additives) 2001 General specifications and considerations for enzyme preparations used in food processing Prepared at the 57 th JECFA (2001) and published in FNP 52 (Addendum 9)