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Jozef Tvarožek (1986)
Mathematica Slovaca
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Jozef Tvarožek (1986)
Mathematica Slovaca
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Jozef Tvarožek (1986)
Mathematica Slovaca
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Ladislav Skula (1966)
Publications de l'Institut Mathématique
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Jan Chvalina (1976)
Archivum Mathematicum
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