TY - JOUR A1 - Wang, Kewen A1 - Zhou, Lizhu A1 - Lin, Fangzhen T1 - Alternating fixpoint theory for logic programs with priority Y1 - 2000 UR - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/19972 SN - 3-540-67797-6 ER -