1
...ScienceDirect (Online service)...

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2
...ScienceDirect (Online service)...

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3
Published 1996
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4
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Published 1995
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7
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Published 1996
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Published 1994
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10
Published 1975
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Published 1997
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12
Published 1995
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13
Published 1996
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Published 1995
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Published 1992
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18
Published 1993
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Published 1994
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20
...ScienceDirect (Online service)...

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