1. The chemical elements of life;Williams;J. Chem. Soc. Dalton Trans.,1991
2. Bioinorganic Chemistry : Inorganic Elements in the Chemistry of Life: An Introduction and Guide;Kaim,1994
3. The Biological Chemistry of the Elements: The Inorganic Chemistry of Life;Da Silva,2001
4. The essential trace elements;Mertz;Science,1981
5. Nutritional requirements for boron, silicon, vanadium, nickel, and arsenic: current knowledge and speculation;Nielsen;FASEB J.,1991