search query: @author Yu, Xingfa / total: 2
references: 1-2 / 2
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1.
Study of Finance and Economics (c)
1999 : 11, p.35-39
1999 Yu, Xingfa
2.
Study of Finance and Economics (c)
1994 : 8, p.13-14
1994 Yu, Xingfa
Zhang, Liangui
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