Meta-Queries on Deductive Databases. - Patrick Doherty 001; Jaroslaw Kachniarz; Andrzej Szalas (Fundam. Informaticae, 1999)

Using Contextually Closed Queries for Local Closed-World Reasoning in Rough Knowledge Databases. - Patrick Doherty 001; Jaroslaw Kachniarz; Andrzej Szalas (Rough-Neural Computing: Techniques for Computing with Words, 2004)