Author: Schwarz, Štefan
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Schwarz, Štefan:
On dual semigroups.
(English).
Czechoslovak Mathematical Journal,
vol. 10
(1960),
issue 2,
pp. 201-230
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Schwarz, Štefan:
A theorem on normal semigroups.
(English).
Czechoslovak Mathematical Journal,
vol. 10
(1960),
issue 2,
pp. 197-200
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