One element extensions of commutative semigroups
Jaroslav Ježek, Tomáš Kepka, Petr Němec (2011)
Acta Universitatis Carolinae. Mathematica et Physica
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Jaroslav Ježek, Tomáš Kepka, Petr Němec (2011)
Acta Universitatis Carolinae. Mathematica et Physica
Similarity:
Jaroslav Ježek, Tomáš Kepka, Petr Němec (2011)
Acta Universitatis Carolinae. Mathematica et Physica
Similarity:
(2011)
Acta Universitatis Carolinae. Mathematica et Physica
Similarity: