Ein fast-Jordan-Hölder Satz für Fastideale.
Einige neue Resultate über abstrakte Halbgruppen
Elementary semigroups.
Embedding any countable semigroups in a 2-generated congruence-free semigroup.
Embedding finite semigroups in finite semibands of minimal depth.
Embedding in bisimple semigroups.
Embedding in globals of finite semilattices
Embedding in globals of groups and semilattices.
Embedding inverse semigroups in coset semigroups.
Embedding semigroups in congruence-free semigroups.
Embedding semigroups in nilpotent-generated semigroups
Embedding semigroups in semibands of depth two.
Embedding semigroups in ...-trivial semigroups.
E-minimal semigroups.
Endomorphism monoids of acts over monoids.
Endomorphism monoids of bands.
Endomorphism monoids of free acts and 0-wreath products of monoids III.
Endomorphism monoids of free acts and 0-wreath products of monoids, I. Annihilator properties.
Endomorphism monoids of free acts and 0-wreath products of monoids, II. Regularity.
Epimorphisms and amalgams