Nam Huyn Efficient Complete Local Tests for Conjunctive Query Constraints with Negation. 82-97 ICDT1997/P082.pdf 1997 ICDT db/conf/icdt/icdt97.html#Huyn97 conf/icdt/97 http://dx.doi.org/10.1007/3-540-62222-5_38 ... journals/is/GuptaB95 conf/pods/GuptaSUW94 ... conf/views/Huyn96 conf/vldb/LevyS93 ... journals/is/TompaB88 books/cs/Ullman88 books/cs/Ullman89