Completely simple semigroups of matrices.
Compression Semigroups of Open Orbits on Real Flag Manifolds.
Computing finite commutative semigroups.
Congruence lattices of Rees matrix semigroups.
Congruence-preserving endomorphisms.
Congruences on semigroups of continuous selfmaps.
Connected algebraic monoids.
Connected CM-homomorphisms into
Connected CM-homomorphisms into semigroups of closed binary relations on hereditarily locally connected cont inua.
Contraction semigroups and representations.
Correction to my paper "On a type of matrix semigroup algebras" .
Corrigenda to "New semigroups of binary relations" "by Karen Chase.
Covering in the set of principal ideals in the semigroup of binary relations.
Cyclic subsemigroups of symmetric inverse semigroups.
Decomposition and complexity of finite semigroups.
Dense subsets of some common classes of semigroups.
Die Darstellung von partiellen -stelligen Operationen
Die -abgeschlossenen Teilmengen der Halbgruppen
Die...-Klassen der endlichen symmetrischen Halbgruppen und ihre Mächtigkeiten.
Differentiability of a convex semigroup on IRm.