1. Gladman T. The physical metallurgy of microalloyed steels. London: The Institute of Materials, 1997.
2. Buirski J, Verdoorn FA, Whitfield JJ. Influence of plate rolling parameters and normalising on the microstructure and mechanical properties of BS 4360 Gr 50B. Iscor Research and Development Report, January 1994.
3. A second report on diagrams of microstructure and hardness for heat-affected zones in welds;Ion;Acta Metallurgica,1984
4. Kirkwood PR. Welding niobium containing microalloyed steels. In: Proceedings International Symposium: Niobium, San-Francisco, 8–11 November 1981:761–802.
5. Pickering FB. Physical metallurgy and the design of steels. London: Applied Science Publishers, 1978.