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

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

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3
Published 1976
...ScienceDirect (Online service)....

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4
...ScienceDirect (Online service)...

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5
Published 1998
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6
...ScienceDirect (Online service)...

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

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8
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9
Published 2006
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10
...ScienceDirect (Online service)...

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11
...ScienceDirect (Online service)...

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12
Published 1975
...ScienceDirect (Online service)....

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