4
Published in 1998
doi: 10.1016/S0012-8252(98)00019-1
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journal article online
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6
Published in 1998
journal article
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7
Published in 1998
doi: 10.1016/S0375-6742(98)00019-3
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conference paper or compendium article online
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9
Published in 1997
doi: 10.1016/S0012-821X(97)00173-8
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journal article online
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