Several papers of Borceux should be mentioned.
- Borceux and Quinteiro. A theory of enriched sheaves. Cahiers de Topologie et Géométrie Différentielle Catégoriques 37.2 (1996): 145-162.
- Borceux and Kelly, On locales of localizations, J. Pure Appl. Algebra, in press.
- Borceux and Veit, Sheaves and localizations: Some counterexamples.
- Borceux Subobject Classifier for Algebraic Structures.