Electronic Resource
Mao-Bai, C.
;
De-Ming, L.
;
Sen-Lin, X.
;
[et al.]
Guo-Sheng, C.
;
Li-Gong, S.
;
Ying-Ji, Z.
;
Xiang-Shun, L.
;
Wei-Yu, Z.
;
Yue-Xiang, Z.
;
Zong-Kun, Z.
Amsterdam
:
Elsevier
Nuclear Inst. and Methods in Physics Research, B
92 (1994), S. 213-216