1. A History of Metallurgy;Tylecote,1992
2. Micrographs appear by kind permission of R.F. Cochrane, University of Leeds and the DoITPoMS Micrograph Library, University of Cambridge.
3. Steels: Metallurgy and Applications;Llewellyn,1998
4. Steels: Microstructure and Properties;Bhadeshia,1995
5. Steel Heat Treatment Handbook; Totten, G. E., Howes, M. A. H.; CRC Press, 1997.