1. ISO 857:1998. Welding and allied processes — Vocabulary — Part 1: Metal welding processes. Date of publication: 1998-12.
2. DIN 8593-6:2003. Manufacturing processes joining — Part 6: Joining by welding — Classifica-tion, subdivision, terms and definitions. Date of publication: September 2003.
3. Definition acc. to “Metalltechnik Lexikon”, www.metalltechnik-lexikon.de.
4. Definition acc. to “Techniklexikon”, www.techniklexikon.net.
5. Fertigungstechnik 2 Bd.2, Hrsg. v. Willy Schal, Verlag: Handwerk Und Technik (Germany).