1. F. A. Cotton and G.Wilkinson, Advanced Inorganic Chemistry, 5th edn., Wiley, New York, 1988, ch. 23.
2. F. A. Cotton and R. A.Walton, Multiple Bonds between Metal Atoms, 2nd edn., Clarendon Press, Oxford, 1993.
3. Metal-Metal Bonds Clusters in Chemistry and Catalysis, ed. J. P. Fackler, Jr., Plenum, New York, 1989.
4. Synthesis and Properties of Low-dimensional Materials, ed. J. S. Miller and A. J. Epstein, The New York Academy of Science, New York, 1978, Part III.
5. Planar Complexes Containing Metal-Metal Bonds