Certain Conjunctive Query Answering in SQL. - Alexandre Decan; Fabian Pijcke; Jef Wijsen (SUM, 2012)

Certain Query Answering in Partially Consistent Databases. - Sergio Greco; Fabian Pijcke; Jef Wijsen (Proc. VLDB Endow., 2014)

First-order under-approximations of consistent query answers. - Floris Geerts; Fabian Pijcke; Jef Wijsen (Int. J. Approx. Reason., 2017)