Unknown
Yang, Q.W.
;
Liu, Yong
;
Ding, X.T.
;
[et al.]
Dong, J.Q.
;
Yan, L.W.
;
Liu, D.Q.
;
Xuan, W.M.
;
Chen, L.Y.
;
Rao, J.
;
Duan, X.R.
;
Song, X.M.
;
Cao, Z.
;
Zhang, J.H.
;
Mao, W.C.
;
Zhou, C.P.
;
Li, X.D.
;
... and further 51
Institute of Physics