%A Laurent Vieille %T Recursive axioms in deductive databases: various solutions %R KB-6 %I European Computer-industry Research Centre %C Munich, Germany %K ECRC %D April 1985 %A Laurent Vieille %T Recursive axioms in deductive databases: the query-subquery approach %R KB-10 %I European Computer-industry Research Centre %C Munich, Germany %K ECRC %D September 1985 %A Laurent Vieille %T A proof procedure db-complete for recursive axioms %R KB-11 %I European Computer-industry Research Centre %C Munich, Germany %K ECRC %D June 1986