1. F. A. Cotton and G.Wilkinson, Advanced Inorganic Chemistry, 5th edn, Wiley & Sons, New York, 1988
2. S. A. Cotton , in Encyclopedia of Inorganic Chemistry, ed. R. B. King, Editon edn, 1994, vol. 7, p. 3595
3. S. A. Cotton , in Comprehensive Coordination Chemistry II, ed. J. A. McCleverty and T. J. Meyer, Editon edn, 2004, vol. 3, p. 93
4. Rare earth coordination compounds: from monodentate ligands via crown ether complexes to a variety of bidentate ligands
5. Benefiting from the Unique Properties of Lanthanide Ions