1. 1) R. J. Fruehan (ed.): The Making, Shaping and Treating of Steel, 11th ed., The AISE Steel Foundation, Pittsburgh, PA, (1998), 525.
2. 2) R. J. Fruehan (ed.): The Making, Shaping and Treating of Steel, 11th ed., The AISE Steel Foundation, Pittsburgh, PA, (1998), 475.
3. 3) R. J. Fruehan (ed.): The Making, Shaping and Treating of Steel, 11th ed., The AISE Steel Foundation, Pittsburgh, PA, (1998), 124.
4. 4) B. Deo and R. Boom: Fundamentals of Steelmaking Metallurgy, Prentice Hall International, Hemel Hempstead, UK, (1993), 194.
5. 5) R. Fortes: private communication.