1
Published 1999
...ScienceDirect (Online service)...

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

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3
...ScienceDirect (Online service)...

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4
Published 1983
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5
...ScienceDirect (Online service)....

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6
...ScienceDirect (Online service)...

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Online Journal
7
...ScienceDirect (Online service)...

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Online Journal