ArchiveVolume 5, Issue 1, February 2017
Andrii Halkin
Pages: 1-5     Published Online: Mar. 4, 2017
DOI: 10.11648/j.sr.20170501.11        Views 1753      Downloads 76
Wang Erhui, Wang Yanzhen
Pages: 6-9     Published Online: Mar. 11, 2017
DOI: 10.11648/j.sr.20170501.12        Views 1727      Downloads 83
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