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Konstanz: Bibliothek der Universität Konstanz, 2004
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KOPS - The Institutional Repository of the University of Konstanz, 2004
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American Mathematical Society (AMS), 1996
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Springer Berlin Heidelberg, 1993
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AIP Publishing, 2013
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Institute of Mathematics, Polish Academy of Sciences, 2005
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Springer Science and Business Media LLC, 1991
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Springer Science and Business Media LLC, 1992
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Khayyam Publishing, Inc, 1990
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Springer Science and Business Media LLC, 1989
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Elsevier BV, 1990
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Springer Science and Business Media LLC, 1987
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Elsevier BV, 1985
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Informa UK Limited, 1980
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Springer Science and Business Media LLC, 2004
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Elsevier BV, 2021