1. Achard, J.C., 1957, “Separation de ceretains elements des terres par voie seche. Application au samarium et a l’ europium,” CR Acad. Sci., Vol. 245, pp. 1064–1066.
2. Anderson R.N., and Parlee, N.A.D., 1976 “Carbothermic reduction of refractory metals,” J.Vac.Sci.Technol., Vol. 7, No. 6, pp. 526–529.
3. Beaudry, B.J., and Gschneidner, Jr., K.A., 1978, Handbook on the Physics and Chemistry of Rare Earths, Vol. 1, K.A. Gschneidner, Jr. and L. Eyring, eds., North Holland, Amsterdam, pp. 173–232.
4. Block, F.E. and Campbell, T.T., 1961, “Rare earth and yttrium halides for metal production — chlorides, bromides and iodides,” The Rare Earths, F.H. Spedding and A.H. Daane, eds., John Wiley, NY, pp. 89–101.
5. Campbell, T.T., and Block, F.E., 1959, “Europium and samarium reduction,” J. Metals, Vol. 11, pp. 744–746.