1. W.M. Thomas, E.D. Nicholas, J.C. Needham, M.G. Murch, P. Templesmith, C.J. Dawes, G.B. Patent Application No. 9125978.8 (December 1991).
2. C. Dawes, W. Thomas, TWI Bulletin 6, November/December 1995, p. 124.
3. Proceedings of the Third International Symposium on Friction Stir Welding;London,2001
4. Effects of friction stir welding on microstructure of 7075 aluminum
5. Microstructural aspects of the friction-stir welding of 6061-T6 aluminum