1. W.M. Thomas, E.D. Nicholas, J.C. Needham, M.G. Church, P. Templesmith, and C.J. Dawes: International Patent Application No. PCT/GB92/02203 and Great Britain Patent Application No. 9125978.8, Friction stir welding, 1991.
2. T. DebRoy and H.K.D.H. Bhadeshia: Sci. Technol. Weld. Join., 2010, vol. 15, pp. 266–70.
3. H. Okamura and K. Aota: Join. Dissimilar Materi. Frict. Stir Weld., 2004, vol. 18, pp. 852–60.
4. S. Lim, S. Kim, C.G. Lee, and S. Kim: Metall. Mater. Trans. A, 2004, vol. 35A, pp. 2837–43.
5. M. Peel, A. Steuwer, P. Withers, T. Dickerson, Q. Shi, and H. Shercliff: Metall. Mater. Trans. A, 2006, vol. 37A, pp. 2183–93.