6
Published in 1990
journal article
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7
Published in 1990
journal article
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9
Published in 1989
doi: 10.1016/0301-9268(89)90078-8
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journal article online
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10
16
Published in 1983
doi: 10.1016/0301-9268(83)90084-0
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conference paper or compendium article online
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20
Published in 1987
doi: 10.1038/327139a0
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journal article online
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