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View all- Schweikardt N(2007)An Ehrenfeucht-Fraïssé game approach to collapse results in database theoryInformation and Computation10.1016/j.ic.2006.10.002205:3(311-379)Online publication date: 1-Mar-2007
- Benedikt MKuijpers BLöding CBussche JWilke T(2006)A characterization of first-order topological properties of planar spatial dataJournal of the ACM10.1145/1131342.113134653:2(273-305)Online publication date: 1-Mar-2006