1. H. Hönl and A. Bottke, ?Welding of pure nickel and nickel-plated steel sheets,? Schweisstechnik, No. 11, 492?496 (1965).
2. R. Hancoc, ?Mechanism and suppression of gas pore formation in tungsten-arc welds in nickel,? Brit. Welding J.,11, No. 11, 566?571 (1964).
3. V. E. Lrivosheya and V. M. Yudin, ?New torches for argon-arc welding of titanium products,? Avtomaticheskaya Svarka, No. 9, 45?46 (1966).
4. I. N. Medrish, N. I. Kamakin, and A. A. Sychev, ?Elimination of porosity in seams during welding of steel-nickel double-layered metal,? Khim. Neft. Mashinpstr., No. 3, 35?36 (1968).