1. Proceedings of JSTP Spring Conference;Nagata,1977
2. Proceedings of Japanese Joint Conference on Technology of Plasticity;Ibata,1977
3. Proceedings of JSTP Spring Conference;Nagata,1978
4. Proceedings of Japanese Joint Conference on Technology of Plasticity;Yamaguchi,1978
5. Proceedings of Japanese Joint Conference on Technology of Plasticity;Shibahara,1978