1. ASM, Metals Handbook, 16, Machining, 9th edn. ASM Int., Metals Park, OH, 1989, p. v.
2. Anon. in The Machining of Copper and its Alloys. CDA Publ. No. 34. Copper Development Association, UK. 1939 (revised 1952).
3. G. J. Hill, Metallurgia 80, 3-11,59-63 (1969).
4. J. E. Williams, E. F. Smart and D. R. Milner, Metallurgia 81, 3-10,51-60 (1970).
5. J. T. Black, in Metals Handbook, 16, Machining. 9th edn. ASM Int., Metals Park, OH, 1989, pp. 7–11.