A note on associative triples of elements in cancellation groupoids
Tomáš Kepka (1980)
Commentationes Mathematicae Universitatis Carolinae
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Tomáš Kepka (1980)
Commentationes Mathematicae Universitatis Carolinae
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František Fiala, Vítězslav Novák (1966)
Archivum Mathematicum
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