1. M. Minami, S.Nagaya, H.Kawashima, 4th NES&C at Osaka Univ. ʼ99: 349
2. H. Kameno, R.Takahata, Y.Miyagawa, H.Ueyama, 55th Meeting of Cryogenic and Superconductivityʼ98
3. H. Higasa, H.Kawauchi, S.Nakamura, N.Itoh, 49th Meeting of Cryogenic and Superconductivityʼ93