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Positivity > 2017 > 21 > 3 > 1143-1159
Algebra universalis > 2016 > 75 > 3 > 301-330
Indagationes Mathematicae > 2013 > 24 > 1 > 291-304
Mathematica Slovaca > 2012 > 62 > 5 > 841-854
Indagationes Mathematicae > 2008 > 19 > 4 > 633-641
Soft Computing > 2008 > 12 > 5 > 453-462
Topology and its Applications > 2007 > 154 > 4 > 917-924
Czechoslovak Mathematical Journal > 2000 > 50 > 3 > 587-602