ＳＡＮＧ Ｈａｉｂｏ ＨＥＫａｉｆｅｎ. J. Journal of Beijing Normal University(Natural Science), 2012, 48(4): 363-366.
Citation: ＳＡＮＧ Ｈａｉｂｏ ＨＥＫａｉｆｅｎ. J. Journal of Beijing Normal University(Natural Science), 2012, 48(4): 363-366.
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