1. FDA, March 22, 1977, retrieved February 15, (2012).
2. Brown HT, Report of the 33rd Session of the Codex Committee on Food Additives.
3. Arno H. Reidies, “Manganese Compounds” Ullmann's Encyclopedia of Chemical Technology (2007).
4. Chemistry of the Elements;Earnshaw,1997
5. Particle size control and self-assembly processes in novel colloids of nanocrystalline manganese oxide;Brock;J. Phys. Chem. B,1999