1. Thomas, W.M., Nicholas, E.D., Needham, J.C., Murch, M.G., Templesmith, P., Dawes, C.J.: “Friction stir butt welding” International patent application no. PCT/GB92/02203 and GB patent application no. 9125978.8, 6 December 1991
2. Mishra, R.S., Ma, Z.Y.: Friction stir welding and processing. Mater. Sci. Eng. R 50, 1–78 (2005)
3. Rodriguez, N.A., Almanza, E., Alvarez, C.J.: Study of friction stir welded A319 and A413 aluminum casting alloys. J. Mater. Sci. 40, 4307–4312 (2005)
4. Mahmood, H.: Ford Motor Company, 2003, www.autosteel.orgaccessed , 6/5/2006
5. Sued, M., Pons, D.: Dynamic interaction between machine, tool, and substrate in bobbin friction stir welding. Int. J. Manuf. Eng. 2016, 1–14 (2016)