1. US Pat. No. 3619181 (1971).
2. L. K. Lamikhov and G. V. Samsonov, ?On modifying aluminum and AL7 alloy by transition metals,?Tsvetn. Metally, No. 8, 79?82 (1964).
3. M. E. Drits, L. S. Toropova, Yu. G. Bykov, et al., ?Properties of Al - Mg and Al - Mg - Sc alloys,?Metalloved. Term. Obrab. Met., 10, 35?37 (1980).
4. M. E. Drits, L. S. Toropova, Yu. G. Bykov, et al.,Metallurgy and Metal Science of Nonferrous Metals [in Russian], Nauka, Moscow (1982), pp. 213 - 223.
5. V. I. Elagin, V. V. Zakharov, and T. D. Rostova, ?Prospects of scandium alloying of aluminum alloys,?Tsvetn. Metally, No. 12, 96 ? 99 (1982).