1. S. Nishijima and M. Jono, J. Mater. Sci., Jpn 31 (1982) 409.
2. H. Ishikawa, ibid. 24 (1975) 344.
3. K. Tokaji and T. Sakai, Science of Machine 39 (1987) 1033.
4. T. Sakai and T. Tanaka, J. Mater. Sci., Jpn 31 (1982) 941.
5. T. Tanaka, J. Arai, S. Nishijima, M. Jowo, T. Shimokawa, T. Tanimoto, T. Sakai and H. Nakayama, “Data Book on Fatigue Strength of Metallic Materials” (Society of Materials Science, Japan, 1982).