Replaceable nets and improper collineations
Václav Havel (1983)
Commentationes Mathematicae Universitatis Carolinae
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Václav Havel (1983)
Commentationes Mathematicae Universitatis Carolinae
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Václav Havel (1967)
Commentationes Mathematicae Universitatis Carolinae
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Rudolf Švarc (1984)
Commentationes Mathematicae Universitatis Carolinae
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