1. Rare-Earth Elements. Technology and Application, Ed. by F. Villani (Park Ridge, New York, 1980; Metallurgiya, Moscow, 1985).
2. A. V. Naumov, Izv. Vyssh. Uchebn. Zaved., Tsvetn. Metall., No. 1, 44 (2008).
3. C. K. Gupta and N. Krishnamurthy, Int. Mater. Rev. 37(5), 197 (1992).
4. A. N. Baraboshkin, in High-Temperature Electrochemistry. Kinetics (Sverdlovsk, 1986), p. 36 [in Russian].
5. N. G. Ilyushchenko, L. P. Klevtsov, A. V. Kovalevskii, and V. V. Soroka, Izv. Vyssh. Uchebn. Zaved., Tsvetn. Metall., No. 3, 121 (1986).