Unknown
Nishimura, H
;
Azechi, H
;
Shiraga, H
;
[et al.]
Nakai, M
;
Miyanaga, N
;
Takabe, H
;
Norimastu, T
;
Fujita, H
;
Shigemori, K
;
Heya, M
;
Izumi, S
;
Honda, H
;
Fujita, K
;
Sunahara, A
;
Honda, M
;
Kanabe, T
;
... and further 10
Institute of Physics