1. Quantales and their sheaves;Borceux;Order,1986
2. F. Borceux and G. Van den Bossche, An essay on non commutative topology, Topology Appl. (to appear).
3. When is Ω a cogenerator in a Topos?;Borceux;Cahiers Topologie Géom. Différentielle,1975
4. A category approach to boolean-valued set theory;Higgs;Lecture Notes,1973