1. B. Giessen and R. Vogel: Z. Metallkd., 1959, vol. 50 (5), pp. 274–77.
2. J.B. Mann: Proc Int. Conf. on Mass Spectroscopy, T. Ogata and T. Hayakawa, eds., University Park Press, Tokyo, 1970, pp. 814–17.
3. Y.A. Ugay, S.I. Meroschnichenko, E.P. Domaschevskaya, and M.A. Vasilevskaya: Neorg. Mater., 1973, vol. 9 (1), pp. 7–9 (in Russian).
4. S. Ban-ya and M. Suzuki: Tetsu-to-Hagané, 1975, vol. 61, pp. 2933–42 (in Japanese).
5. Y.A. Ugay, A.F. Demidenko, V.I. Koshchenko, V.E. Yachmenev, L.I. Sokolov, and E.G. Goncharov: Neorg. Mater., 1979, vol. 15 (5), pp. 739–43 (in Russian).