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Berlin, Heidelberg: Springer Berlin Heidelberg, 1989
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Canadian Mathematical Society, 1997
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American Mathematical Society (AMS), 1996
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Elsevier BV, 1996
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Informa UK Limited, 1995
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American Mathematical Society (AMS), 1992
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JSTOR, 1992
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American Mathematical Society, 1992
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Informa UK Limited, 1992
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American Mathematical Society (AMS), 1988
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Sigma Xi Scientific Research Society, 1984
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American Mathematical Society (AMS), 1983
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Elsevier BV, 1972
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Elsevier BV, 1970
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Springer Science and Business Media LLC, 1969
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American Mathematical Society (AMS), 1969
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JSTOR, 1969
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American Mathematical Society, 1969
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Canadian Mathematical Society, 1968
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Proceedings of the National Academy of Sciences, 1967