1. D. Stephen, Superplastic Forming and Diffusion Bonding of Titanium, Designing with Titanium, Institute of Metals, London, U.K. (1986), 108-120.
2. B.P. Kashyap and A.K. Mukherjee: Res. Mechanica, 17 (1986), pp.293-355.
3. L. V. Usacheva, et. al.: Svarochnoe Proizvodstvo, 57(2004), 11-15.
4. Y. Mizuno, et al.: 15th International Vacuum Congress, San Francisco, CA, U.S.A. October 28, (2001).