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2. I. P. Chekunov et al., in: Brazing in Machine Construction [in Russian], No. 2, MDNTP (1967).
3. S. N. Lotsmanov et al., Author's Certificate (patent) No. 234834; Otkrytiya, Izobret, Prom. Obraztsy., No. 4, 137 (1969).
4. I. P. Chekunov, Transactions of a Seminar on the Brazing of Metals in Industry and Its Future Poten-tialities [in Russian], Vol. 2 (1962).
5. B. A. Borok et al., Poroshkovaya Met., No. 5, 6 (1968).