1. M. Hatate, T. Shiota, K. Sone, Reports of the JFS Meeting 133 No. 52
2. T. Noguchi, T. Nakamura, T. Matsuzaki, M. Goke, S. Waji, Reports of the JFS Meeting 127 No. 118
3. T. Shiota, M. Hatate, K. Takemoto, JFS 69(11), 904–910 (1997)
4. K. Kimura, JFS 61(8), 566 (1989)
5. K. Mizuno, T. Fukusako, Material 31(340), 88–89 (1981)