Author: Varisco, Ada
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Cherubini, Alessandra; Varisco, Ada:
Semigroups and rings whose proper one-sided ideals are power joined.
(English).
Czechoslovak Mathematical Journal,
vol. 34
(1984),
issue 1,
pp. 121-125
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Cherubini, Alessandra; Varisco, Ada:
Semigroups whose proper subsemigroups are duo.
(English).
Czechoslovak Mathematical Journal,
vol. 34
(1984),
issue 4,
pp. 630-644
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