Article

  • LI Chun-Sheng ,
  • YANG Ling-Ling
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Online published: 2015-03-30

Cite this article

LI Chun-Sheng , YANG Ling-Ling . [J]. Journal of East China Normal University(Natural Science), 2015 , 2015(S1) : 99 -103 . DOI: 10.3969/j.issn.1000-5641.2015.z1.017

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