Unknown
Yamasaki, A
;
Matsui, Y
;
Imada, S
;
[et al.]
Takase, K
;
Azuma, H
;
Muro, T
;
Kato, Y
;
Sekiyama, A
;
Suga, S
;
Higashiya, A
;
Yabashi, M
;
Tamasaku, K
;
Ishikawa, T
;
Terashima, K
;
Kobori, H
;
Sugimura, A
;
... and further 5
Institute of Physics