1. T. Moeller, D.F. Martin, L.C. Thompson, R. Ferrus, G.R. Feistel and W.J. Randall. The coordination chemistry of yttrium and the rare earth metal ions. Chem. Rev., 65 (1965), 1.
2. Progress in the Science and Technology of the Rare Earths vol. 1 (1964); vol. 2 (1966); vol. 3 (1968), (ed. LeRoy Eyring), Pergamon, Oxford.
3. H.J.S. Gysling and M. Tsutsui. Organolanthanides and organoactinides. Adv. organometal. Chem., 9 (1970), 361.
4. R.G. Hayes and J.M. Thomas. Organometallic compounds of the lanthanides and actinides. Organometal. Chem. Rev., 7A (1971), 1.
5. Lanthanides and Actinides, M.T.P. International Review of Science Series One, volume 7 (ed. K.W. Pagnall), Butterworths, London (1971).