The semigroup generated by certain operators on the congruence lattice of a Clifford semigroup.
The structure of the automorphism group of a Croisot-Tessier semigroup.
The structure of the minimum group kernel of a regular semigroup
The structure of type A semigroups.
The tensor product of groupoids
The translational hull of an adequate semigroup.
The universal group of homogeneous quotients.
Tolerance distributive and tolerance Boolean varieties of semigroups
Transformation semigroup diagram and the ...-relation.
Transitive inverse semigroups on compact spaces.
Translations of commutative unique factorization semigroups.
TX is absolutely closed.
Über das Radikal in potenzverbundenen Halbgruppen
Über die Funktionalgleichung f(f(x) * f(y)) = f(x*y).
Über die Funktionalgleichung f(f(x)*f(y)) = f(x*y). (Short Communication).
Über die kleinste separative Kongruenz auf einer Halbgruppe
Union and symmetry preserving endomorphisms of the semigroup of all binary relations on a set
Union and symmetry preserving homomorphisms of semigroups of closed relations.
Union preserving homomorphisms of semigroups of closed relations.
Varieties of left distributive semigroups