TY - JOUR A1 - Schaub, Torsten H. A1 - BrĂ¼ning, Stefan A1 - Nicolas, Pascal T1 - XRay : a prolog technology theorem prover for default reasoning: a system description Y1 - 1996 UR - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/25472 SN - 3-540-61511-3 ER -