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2. CIRP (ed) (2004) Dictionary of production engineering: material removal processes, vol 2. Springer, Berlin
3. DIN 8589-5 (2003) Fertigungsverfahren Spanen, Teil 5: Räumen Einordnung, Unterteilung, Begriffe [Manufacturing processes chip removal, part 5: broaching classification, subdivisions, terms and definitions]. Beuth, Berlin
4. Fritz AH, Schulze G (2008) Fertigungstechnik [Forming], 8th edn. Springer, Berlin. (in German), with permission of Springer
5. Hoffmann K (1976) Hoffmann Räumpraxis [Hoffmann broaching practice]. Fa. Kurt Hoffmann, Pforzheim. (in German)