On dense subsets of rational numbers
Jacek Cichoń (2001)
Acta Universitatis Carolinae. Mathematica et Physica
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Jacek Cichoń (2001)
Acta Universitatis Carolinae. Mathematica et Physica
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Petr Simon (1977)
Commentationes Mathematicae Universitatis Carolinae
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Petr Simon (1990)
Commentationes Mathematicae Universitatis Carolinae
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