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3. Yu. G. Dorofeev and D. I. Kritin, Poroshkovaya Met., No. 12 (1967).
4. G. D. Nikiforov, V. V. D'yachenko, et al., Svarochn. Proizv., No. 12 (1967).
5. R. Kan (editor), Physical Metallurgy [in Russian], Mir, Moscow (1968).