1. ‘Metals handbook’, 10th edn, Vol. 1, 841; 1990, Metals Park, OH, ASM.
2. R. H. WITT and W. T. HIGHBERGER: in ‘Materials synergisms’, 282–305; 1978, Azusa, CA, Society for the Advancement of Material and Process Engineering.
3. ‘Metals handbook’, 9th edn, Vol. 7, 100; 1984, Metals Park, OH, ASM.