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Springer Science and Business Media LLC, 1994
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Springer Science and Business Media LLC, 2000
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JSTOR, 1997
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Mathematical Association of America, 1997
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Springer Science and Business Media LLC, 1978
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Steklov Mathematical Institute, 1977
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Steklov Mathematical Institute, 1962
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IOP Publishing, 1987
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Steklov Mathematical Institute, 1973
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JSTOR, 1989
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JSTOR, 1996
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Mathematical Association of America, 1996
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Steklov Mathematical Institute, 1993
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Steklov Mathematical Institute, 1988
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Steklov Mathematical Institute, 1962