1. Meetham, G. W. (1978). High Temperature Alloys for Gas Turbines, Applied Science Publishers, London, p. 837.
2. Moore, J. P. and Athey,R. L. (1970). United Aircraft Corporation, US Patent 3,519,503.
3. Lyman, T. (Ed.) (1970). Hammers and presses for forging, Metals Handbook, Forging and Casting, Vol. 5, 8th Ed., American Society for Metals, p. 4.
4. Watmough, T., Kulkarni, K. M. and Parikh, N. M. (1970). Isothermal forging of Ti alloys using large precision cast dies, Technical Report AFML- TA-70–161, Air Force Material Lab., Dayton, Ohio, USA.
5. Baudelet, B. (1974). Metals and Materials, p. 117.