Polynomial functions over monoids.
Positive definite functions on Abelian semigroups
Positive definite functions on discrete commutative semigroups.
Positive functions from -indecomposable semigroups into partially ordered sets
Positive-definite functions on discrete commutative semigroups: Errata and supplements.
(Pre)order preserving additive homomorphisms of (pre)ordered commutative semigroups into real numbers
Primitive orthodox semigroups.
Properties of congruences on commutative monoids.
Quasi-injective -systems and their -endomorphism semigroup
Quasi-inverse semigroups with special involution.
Quotient monoids and greatest commutative monoid images of several types.
Range sets and partition sets in connection with congruences and algebraic invariants.
Reconstructing some idempotent-generated semigroups from their biordered sets.
Reduction algorithms for some classes of aperiodic monoids
Rees quotients of N-semigroups.
Relations on the lattice of congruences of a regular semigroup.
Remarks on isomorphisms of regressive transformation semigroups.
Remarks on tolerance semigroups
Representation modulaire des F-réguliers.
Representations into the hyperspace of a compact group.