On a theorem of M. Katětov
Stanislav Tomášek (1966)
Commentationes Mathematicae Universitatis Carolinae
Similarity:
Stanislav Tomášek (1966)
Commentationes Mathematicae Universitatis Carolinae
Similarity:
Stanislav Tomášek (1965)
Commentationes Mathematicae Universitatis Carolinae
Similarity:
Kamil John, Miloš Dostál (1966)
Commentationes Mathematicae Universitatis Carolinae
Similarity: