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Both authors were partially supported by DGICYT PB91-0231-C02-01.
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Elias, J., Garcia, R. On the number of equations defining affine varieties with isolated singularities. Arch. Math 65, 94–96 (1995). https://doi.org/10.1007/BF01196586
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DOI: https://doi.org/10.1007/BF01196586