Note on universal topological completion Rudolf-E. Hoffmann (1979) Cahiers de Topologie et Géométrie Différentielle Catégoriques
Notes on enriched categories with colimits of some class. Kelly, G.M., Schmitt, V. (2005) Theory and Applications of Categories [electronic only]
Notions of flatness relative to a Grothendieck topology. Karazeris, Panagis (2004) Theory and Applications of Categories [electronic only]