The seventieth anniversary of Professor Josef Novák
Zdeněk Frolík, František Zítek (1975)
Czechoslovak Mathematical Journal
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Zdeněk Frolík, František Zítek (1975)
Czechoslovak Mathematical Journal
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Roman Frič, Darrell C. Kent (1995)
Czechoslovak Mathematical Journal
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Roman Frič, Darrell C. Kent (2000)
Czechoslovak Mathematical Journal
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