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Acta Universitatis Matthiae Belii. No. 19 (2011), Series Mathematics.

Acta Universitatis Matthiae Belii. Volume 23 (2015), Series Mathematics /

Acta Universitatis Matthiae Belii. Number 17, Series Mathematics /

Acta Universitatis Matthiae Belii. Volume 24 (2016), Series Mathematics /

Acta Universitatis Matthiae Belii. Number 14, Series Mathematics.

Acta Universitatis Matthiae Belii. No. 15 (2009), Series mathematics.

Acta Universitatis Matthiae Belii. Number 16, Series mathematics /

Acta Universitatis Matthiae Belii. Volume 25, Series mathematics /

Acta Universitatis Matthiae Belii. Volume 26, Series mathematics /

Acta Universitatis Matthiae Belii. Volume 27, Series mathematics /

Acta Universitatis Matthiae Belii. Volume 20 (2012), Series Mathematics /

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