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2. Massalski, T. D. (Binary Alloy Phase Diagrams, Vol. 1–2, American Society for Metals, Metals Park, Ohio, 1986, pp. 395–397).
3. Rudy, E. (AFML-TR-65–2 Pt. V; AD-689843 [1969] 1–689, 214–5).
4. Kieffer, R.; Benesovsky, F. (Hartstoffe, Springer, Wien 1963, pp. 429–34).
5. Portnoi, K. I.; Romashov, V. M.; Levinskii, Yu V.; Romanovich, I. V. (Poroshk. Metall. [Kiev] 1967 No. 5, pp. 75–80; Sov. Powder Metall. Met. Ceram. [Engl. Transi.] 1967 398–402).