1. Fraústo da Silvia JJR, Williams PJ (1994) The biological chemistry of the elements. Clarendon Press, Oxford
2. Kaim W, Schwederski B (1996) Bioinorganic chemistry: inorganic elements in the chemistry of life. Wiley, Chichester
3. Poulos TL (1996) J Biol Inorg Chem 1:356–359
4. Sigfridsson E, Olsson MHM, Ryde U (2001) J Phys Chem B 105:5546–5552
5. Li H (2001) In: Messerschmidt A, Huber R, Poulos T, Wieghart K (eds) Handbook of metalloproteins. Wiley, Chichester, pp 486–502