Remark on topological spaces with given semigroups
Zdeněk Hedrlín, Aleš Pultr (1963)
Commentationes Mathematicae Universitatis Carolinae
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Zdeněk Hedrlín, Aleš Pultr (1963)
Commentationes Mathematicae Universitatis Carolinae
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Zdeněk Hedrlín (1962)
Commentationes Mathematicae Universitatis Carolinae
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Věra Trnková (1975)
Commentationes Mathematicae Universitatis Carolinae
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