Unknown
Motojima, O
;
Ohyabu, N
;
Komori, A
;
[et al.]
Kaneko, O
;
Yamada, H
;
Kawahata, K
;
Nakamura, Y
;
Ida, K
;
Akiyama, T
;
Ashikawa, N
;
Cooper, W.A
;
Ejiri, A
;
Emoto, M
;
Ezumi, N
;
Funaba, H
;
Fukuyama, A
;
... and further 114
Institute of Physics