1. See for example a) , Metal-Ligand Multiple Bonds, Wiley, New York, 1988,
2. (b) Transition Metal Carbide and Nutride, Academic Press, New York. 1971,
3. (c) Recent Developments in the Chemistry of Transition Metal Carbides and Nitrides in Survey & Progress in Chemistry 8 (Ed.: ), Academic Press, New York, 1977,
4. Nitrido Complexes of Transition Metals
5. See for example a) in Comprehensive Organometallic Chemistry (Ed.: ), Vol. 6, Chapt. 40, Pergamon, Oxford, 1982,