1. Council Directive on the Approximation of the Regulations of Member States Concerning Colouring Materials which may be Used in Foodstuffs Intended for Human Consumption;Council of the European Economic Community;J. off. Commun. Europ.,1962
2. Mitteilung 6;Deutsche Forschungsgemeinschaft—Farbstoff-Kommission,1957
3. Report on Colouring Matters;Food Standards Committee,1964
4. Specifications for Identity and Purity of Food Additives. Vol. II. Food Colors;Joint FAO/WHO Expert Committee on Food Additives—Fourth Report,1963
5. Specifications for the Identity and Purity of Food Additives and their Toxicological Evaluation: Food Colours and some Antimicrobials and Antioxidants;Joint FAO/WHO Expert Committee on Food Additives—Eighth Report;Tech. Rep. Ser. Wld Hlth Org.,1965