2011NO.29
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dx[J].,1999,8(3):9598.
,[4].[J].,
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,,1992,24(3):99102
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[5].[J].,
,2009,39(11):211216.
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[J].,1994,18(11):9396.
[7].[M].,1999.
[8].[M].:,2010.
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[9],[M].:,2002.
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