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Klagenfurth: Heyn, 2004
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Klagenfurt: Heyn, 2005
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Springer Science and Business Media LLC, 2015
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Mathematical Notes, 2005
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Institute of Mathematics, Czech Academy of Sciences, 2002
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Springer Science and Business Media LLC, 1995
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Springer Science and Business Media LLC, 1989
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Springer Science and Business Media LLC, 1979
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Springer Science and Business Media LLC, 2020
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Springer Science and Business Media LLC, 2017
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Elsevier BV, 2013
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Mathematical Notes, 2012
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Walter de Gruyter GmbH, 2011
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Elsevier BV, 2009
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University of Zielona Góra, Poland, 2009
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Springer Science and Business Media LLC, 2008
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Elsevier BV, 2008
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Institute of Mathematics, Czech Academy of Sciences, 2007
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University of Zielona Góra, Poland, 2007
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Mathematical Notes, 2006