ＬＩＹｏｎｇ ＬＩＨａｎｄｏｎｇ ＷＡＮＧＹｏｕｇｕｉ. J. Journal of Beijing Normal University(Natural Science), 2011, 47(5): 542-545.
Citation: ＬＩＹｏｎｇ ＬＩＨａｎｄｏｎｇ ＷＡＮＧＹｏｕｇｕｉ. J. Journal of Beijing Normal University(Natural Science), 2011, 47(5): 542-545.
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