1. D. Altenpohl, Aluminium von innen: Das Profil eines modernen Metalles, 5th ed., Aluminium-Verlag, Düsseldorf, 1994.
2. M. Bauser, G. Sauer, K. Siegert, Strangpressen, 2nd ed., Aluminium Verlag, Düsseldorf, 2001.
3. R.F. Tylecote, The solid phase welding of metals, Edward Arnold, London, 1968.
4. H. Valberg, IJMPT 17 (2002) 497.
5. Proceedings of the Ninth International Aluminum Extrusion Technology Seminar. A World of Ideas, ET Foundation, Wauconda, Ill., 2008, pp. 471-478.