An equivalence theorem for inverse semigroups.
An extension theorem of functionals on commutative semigroups
Any distributive lattice is determined by a semigroup from a certain class.
Archimedean classes in an ordered semigroup. IV
Arithmetical theory of monoid homomorphisms.
Atomicity of tolerance lattices of commutative semigroups
Atomistic congruence lattices of semilattices.
Automorphism invariants for semigroups.
Automorphisms of polynomial semigroups.
Automorphisms of the semigroup of finite complexes of locally finite groups.