1. W.G. Bader, Welding Research Supplement, December 1969, p. 551s.
2. M. Bester, InterNEPCON Proceedings, 1968, p. 211.
3. F.G. Foster, ASTM Special Technical Publications, No. 319, 1962.
4. S.D. Ebneter, NASA Technical Memorandum X-53335, Oct. 1965.
5. P. Vianco, Soldering Handbook, American Welding Society, ISBN 0-87171-618-6, p. 182.