Semigroup representations of commutative idempotent Abelian groupoids
Semigroup representations of medial groupoids
Simplicial T-complexes and crossed complexes: a non-abelian version of a theorem of Dold and Kan [Book]
Some remarks on distributive groupoids
Sous-catégories semi-pleines maximales d'une catégorie
Special morphisms of groupoids.
Stability of a functional equation coming from the characterization of the absolute value of additive functions.
Strict nuclei and pseudoautomorphisms of grupoids with division
Strong morphisms of groupoids.
Structure de l'ensemble des fermetures d'un treillis complet
Subdirectly irreducible groupoids in some varieties
Symmetrisations of semigroups.