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Miroslav Hušek (1964)
Commentationes Mathematicae Universitatis Carolinae
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Miroslav Hušek (1964)
Commentationes Mathematicae Universitatis Carolinae
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Jiří Adámek, Jan Reiterman (1976)
Commentationes Mathematicae Universitatis Carolinae
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Aleš Pultr (1964)
Commentationes Mathematicae Universitatis Carolinae
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