Tolerance relations on periodic commutative semigroups
T-opérateurs sur un groupoïde
Topological Semigroups. History, Theory, Applications.
Totally ordered archimedean semigroups.
Translational hull of an inverse semigroup.
Translational hulls of polynomially related semigroups
Translations of commutative unique factorization semigroups.
Trees and monotone structures.
Two Congruence Lattices of Completely Simple Semigroups.
Two-Sided Bases of Semigroups
Über das Radikal in potenzverbundenen Halbgruppen
Über die kleinste separative Kongruenz auf einer Halbgruppe
Über die Ordnung von Halbgruppen mit gewissen Eigenschaften.
Une arithmétique non commutative des demi-groupes et des anneaux
Une extension du lemme de Green et ses applications
Uniform semigroups whose proper quasiideal s are power joined.
Unions of dihedral groups.
Universal groups on semilattices of reversible cancellative semigroups .
Universal semigroups.
Varietes de languages et monoide des parties.