Duality of vector spaces
Extensions of factorization systems
Fundamental groupoids of -graphs.
Groupoids and crossed objects in algebraic topology.
How algebraic is algebra?
Iterative and metric algebraic theories
Mehrfache Partialisierung von Kategorien
Moduli of objects in dg-categories
On congruence lattices in a category
On generalized Hom-functors of certain symmetric monoidal categories
On generic separable objects.
Pseudogroupoids and commutators.
Remarks on topologically algebraic functors
Representations of modules and Cauchy completeness
Sous-catégories réflexives et la théorie générale des radicaux
Structures Quasi-Quotient.
Sur la domination des catégories, II et III
Sur les catégories préadditives topologiques
T-categories and some representation theorems
The extensive completion of a distributive category.