1. ASM Metals Handbooks, vol. 6, American Society of Metals, Cleveland, OH, USA, 1971.
2. M. El Sawy, A. Salama, B. Zakarra, Proceedings of the International Conference on Trends in Welding Research, 1986, pp. 367–370.
3. M.M. Schawartz, Metals Joining Manual Book, McGraw-Hill, New York, USA, 1979.