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Walter de Gruyter GmbH, 1988
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Springer Science and Business Media LLC, 2020
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Springer Science and Business Media LLC, 2018
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Centre pour la Communication Scientifique Directe (CCSD), 2018
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Faculty of Sciences, University of Novi Sad, 2016
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The Korean Mathematical Society, 2013
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The Mathematical Society of the Republic of China, 2012
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Mathematical Society of the Republic of China, 2012
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Institute of Mathematics, University of Tsukuba, 2010
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Institute of Mathematics, University of Tsukuba, 2010
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Walter de Gruyter GmbH, 2004
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2004
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Hindawi Limited, 2004
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Societatea de Ştiinţe Mathematice Din România, 1997
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University of Debrecen/ Debreceni Egyetem, 1997
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Springer Science and Business Media LLC, 1984
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Canadian Mathematical Society, 1976
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Canadian Mathematical Society, 1969
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Mathematical Institute, Tohoku University, 1962
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Institute of Mathematics, University of Tsukuba, 1996