1. K. Honda and S. Kaya, sci. Rep. Tohoku Univ., Vol 15, 1926, p 721
2. H.J. Williams, Phys. Rev., Vol 52, 1937, p 747
3. T. Senuma, H. Yada, G. Matsumura, and K. Yamada, Tetsu-to-Hagané, Vol 73, 1987, p 1598–1605
4. P.J. Regenet and H.P. Stuwe, Z. Metallkd., Vol 54, 1963, p 273
5. I.L. Dillamore and W.T. Roberts, J. Inst. Met., Vol 92, 1963/64, p193