1. Proc. 1974 Japan. Conf. Technol. Plasticity;Abe,1974
2. Proc. 1974 Japan. Conf. Technol. Plasticity;Nakajima,1974
3. Proc. 1974 Japan. Conf. Technol. Plasticity;Nakajima,1974
4. Proc. 1975 Japan. Conf. Technol. Plasticity;Okamoto,1975
5. Proc. 1975 Japan. Conf. Technol. Plasticity;Fukuda,1975