1. ASM “Metals Handbook. (1964). Volume II. ASM, Metals Park, Ohio.
2. Backofen, W. A., and Ebner, M. E. (1962). In Technical Report No. WAL TR 310.24/5–2. Watertown Arsenal Laboratories, Watertown, Massachusetts.
3. Backofen, W. A., and Ebner, M. E. (1963). In Technical Report No. WAL TR 310.24/5–4. Watertown Arsenal Laboratories, Watertown, Massachusetts.