1. V. P. Soldatov, V. I. Startsev, et al., Fiz. Tverd. Tela12, No. 1 (1970).
2. R. Siems and P. Haasen, Z. Metallk.,49 (1958).
3. D. C. Jillson, Trans. ALMME,188 (1950).
4. R. E. Cooper and J. Washburn, Acta Metall.,15, No. 4 (1967).
5. T. Takeuchi, J. Phys. Soc. Japan,21, No. 12 (1966).