By Wang Lei   Guo Yugao   Liang Shumei   Yang Qingqing   Wei Junfu   in Journal of Church and State

ISSN:0021-969X|49|9|671-675

Oxford University Press‎(2011)‎

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By Yao Hu-Rong   Yin Ya-Xia   Guo Yu-Gao   in Chinese Physics B

ISSN:1674-1056|25|1|18203-18209

IOP Publishing‎(2016)‎

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