K šesťdesiatinám profesora Michala Greguša
Jozef Eliáš (1986)
Mathematica Slovaca
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Jozef Eliáš (1986)
Mathematica Slovaca
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Milan Gera, Alexander Haščák (1991)
Mathematica Bohemica
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Valter Šeda (1979)
Mathematica Slovaca
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