1
Published in 1985
doi: 10.1016/0040-1951(85)90170-2
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conference paper or compendium article online
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8
Published in 1995
doi: 10.1016/0169-1368(95)00009-7
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journal article online
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15
Published in 1998
doi: 10.1016/S0012-821X(98)00158-7
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journal article online
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