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These results were obtained while the author was visiting the University of California, Berkeley as part of a University of Tasmania Outside Studies Programme and with the partial support of a Fulbright Senior Scholar Award.
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Gardner, B.J. Small ideals in radical theory. Acta Math Hung 43, 287–294 (1984). https://doi.org/10.1007/BF01958025
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DOI: https://doi.org/10.1007/BF01958025