1. Absence of carcinogenic and anticarcinogenic effects of annatto in the rat liver medium‐term assay;Agner;Food and Chemical Toxicology,2004
2. Aoki H, 2001. Preliminary 2‐week study of Annatto C (norbixin) in rats. Study Number: 0137.
3. Aoki H, 2002. Reverse Mutation Test of Annatto C and F in Bacteria (Ames Test, Study Nos 214 and 215). 12.03.2002.
4. Genotoxicity of pigments from seeds of Bixa orellana L. (atsuete). II. Determined by lethal test;Aranez;Philippine Journal of Science,1997
5. Genotoxicity of pigments from seeds of Bixa orellana L. (Atsuete). I. Determined by Allium test;Aranez;Philippine Journal of Science,1996