1
Published 2006
2
Published 1996
3
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4
Published 2000
5
Published 2007
6
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7
Published 2003
8
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9
10
Published 1983
11
Published 2006
12
13
Published 2008
14
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15
Published 2001
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16
17
Published 1990
18
19
Published 1992
20
Published 2004