The 60th anniversary of Professor František Šik
Ján Jakubík, Milan Sekanina (1981)
Czechoslovak Mathematical Journal
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Ján Jakubík, Milan Sekanina (1981)
Czechoslovak Mathematical Journal
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Milan Kolibiar (1983)
Czechoslovak Mathematical Journal
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Mária Csontóová, Štefan Černák, Miroslav Ploščica (1994)
Mathematica Slovaca
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