1. L. D. Dudkin and L. I. Petrova, Perspekt. Mater., No. 5, 15 (1996).
2. M. I. Fedorov, V. K. Zaitsev, F. Yu. Solomkin, et al., Pis’ma Zh. Tekh. Fiz. 23(15), 64 (1997) [Tech. Phys. Lett. 23, 602 (1997)].
3. L. I. Petrova, L. D. Dudkin, and V. S. Khlomov, Neorg. Mater. 31, 1216 (1995).
4. E. I. Gladyshevskii, Crystal Chemistry of Silicides and Germanides (Metallurgiya, Moscow, 1971).
5. L. I. Petrova, L. D. Dudkin, V. S. Khlomov, et al., Zh. Tekh. Fiz. 70(5), 119 (2000) [Tech. Phys. 45, 641 (2000)].