1. W.M. Thomas, E.D. Nicholas, J.C. Needham, M.G. Murch, P.T. Smith, and C.J. Dawes, International Patent No. PCT/GB92/02203, GB Patent No. 9125978.8 (1991), US Patent No. 5,460,317 (1995)
2. J.H. Ouyang and R. Kovacevic, 2002 Material Flow and Microstructure in the Friction Stir Butt Welds of the Same and Dissimilar Aluminum Alloys, J. Mater. Eng. Perfom. 11(1), 51–63
3. W.J. Arbegast, 2006 Friction Stir Welding After a Decade of Development, Weld. J., 85(3), 28–35
4. H.R. Shercliff, J. Michael, M.J. Russell, A. Taylor, and T.L. Dickerson, 2005 Microstructural Modeling in Friction Stir Welding of 2000 Series Aluminum Alloys, Mec. Indust., 6, 25–35
5. Y.S. Sato, S·H. Park, and H. Kokawa, 2001 Microstructural Factors Governing Hardness in Friction Stir Welds of Solid-Solution-Hardened Al Alloys, Metall. Mater. Trans. A, 32, 3033