Electronic Resource
Wang, Xiao-fang
;
Xu, Zhi-zhan
;
Chen, Shi-sheng
;
[et al.]
Qian, Ai-di
;
Fan, Pin-zhong
;
Zhang, Zheng-quan
;
Lin, Li-huang
;
Feng, Xian-ping
;
Gong, Mei-xia
;
Shan, Bing
;
Gao, Sheng-chen
Woodbury, NY
:
American Institute of Physics (AIP)
Applied Physics Letters
58 (1991), S. 2901-2903