%0 Journal Article %J Logical Foundations for Cognitive Agents: Contributions in Honor of Ray Reiter %D 1999 %T Logic and databases: a 20 year retrospective-updated in honor of Ray Reiter %A Minker, Jack %B Logical Foundations for Cognitive Agents: Contributions in Honor of Ray Reiter %P 234 - 299 %8 1999/// %G eng