On anti-inverse semigroups.
Nil-extensions of unions of groups induced by identities.
Semilattice decomposition of semigroups.
Decompositions of semigroups induced by identities.
Sur les demi-groupes dans lesqules tous les sous-demi-groupes propres sont idempotents, II
Inflation of a union of groups
Semigroups whose proper left ideals are commutative
O slabo komutativnoj polugrupi
Decompositions of semigroups with zero.
The lattice of subautomata of an automaton: A survey.
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