title: disjunctive datalog t eiter , g gottlob , h mannila 1997. authors: nan. venue: acm trans . database syst .. year: nan
title: strong and weak constraints in disjunctive datalog f buccafurri , n leone , p rullo proceedings of the 4th international conference on logic & hellip ; , 1997.0. authors: nan. venue: nan. year: nan