Larsen, JC; Tarding, F. Hypersensitivity reactions to food colours with special reference to the natural colour annatto extract (butter colour). Archives of
美国食品安全研究所(英语:Food Safety Institute of the Americas) 营养教育和培训项目(英语:Nutrition Education and Training Program) 国家自然资源保护基金会(英语:National Natural Resources Conservation