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Saarbrücken: Univ., 1987
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Mathematical Sciences Publishers, 1983
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The Electronic Journal of Combinatorics, 2005
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Michigan Mathematical Journal, 1984
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Springer Berlin Heidelberg, 1983
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Wiley, 1981
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The Electronic Journal of Combinatorics, 2024
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Elsevier BV, 2009
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Elsevier BV, 2007
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Elsevier BV, 2006
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Elsevier BV, 2019
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Elsevier BV, 2016
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Elsevier BV, 2014
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The Electronic Journal of Combinatorics, 2011