1. T.L. Oberle, C.D. Loyd, and M.R. Calton: Welding J., 1967, vol. 46, p. 511.
2. K.K. Wang: Friction Welding, Welding Research Council Bulletin 204, Welding Research Council, 1975, pp. 1–22.
3. Y.C. Kim, A. Fuji, and T.H. North: Mater. Sci. Technol. 1995, vol. 11, pp. 383–88.
4. J.P. Ferte: J. Phys. IV, 1993, vol. 3, pp. 1019–27.
5. M. Preuss, J.W.L. Pang, P.J. Withers, and G.J. Baxter: Metall. Mater. Trans. A, 2002, vol. 33A, pp. 3215–25.