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Providence, RI: American Mathematical Soc. [u.a.], 2007 ; [London]: London Mathematical Society, 2007
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American Mathematical Society (AMS), 1981
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JSTOR, 1981
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American Mathematical Society, 1981
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Elsevier BV, 1980
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Michigan Mathematical Journal, 1983
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American Mathematical Society (AMS), 1988
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JSTOR, 1988
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American Mathematical Society, 1988