1. ?Advanced Aluminium and Titanium Structures?, edited by J. Goodman, (American Society of Mechanical Engineers, Washington, November, 1981), p. 33.
2. Edited byIdem, ibid.?, p. 19.
3. C. L. Cline,Welding J. Suppl. 45 (1966) 481s.
4. D. Hausser, D. A. Kammer andJ. H. Dedrick,ibid. 46 (1967) 11s.
5. M. M. Schwartz, ?Metals Joining Manual? (McGraw-Hill, New York, 1979) p. 10?16.