1. (a) B.M. Trost, I. Fleming, S.L. Schreiber (Eds.), Comprehensive Organic Synthesis, Pergamon Press, Oxford, 1991.
2. (b) C. Elschenbroich, A. Salzer, Organometallic Chemistry, Teubner, Stuttgart, 1994.
3. (a) W. Kaim, B. Schwederski, Bioanorganische Chemie, Teubner, Stuttgart, 1995.
4. (b) J.J.R. Frausto da Silva, R.J.P. Williams, The Biological Chemistry of the Elements, Clarendon Press, Oxford, 1994.
5. Cf. articles of Eklund, Cedergren-Zeppezauer, Zeppezauer, Pocker, Pettersson, Makinen, Dutler and Dunn in I. Bertini, C. Luchinat, W. Maret, M. Zeppezauer (Eds.), Zinc Enzymes, Birkhäuser, Basel, 1986.