A note on Chehata's groups
Ladislav Beran (1966)
Commentationes Mathematicae Universitatis Carolinae
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Ladislav Beran (1966)
Commentationes Mathematicae Universitatis Carolinae
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Svatopluk Fučík (1967)
Commentationes Mathematicae Universitatis Carolinae
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Jan Kadlec, Alois Kufner (1966)
Commentationes Mathematicae Universitatis Carolinae
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