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**.