<?xml version="1.0"?>
<dblp>
<article key="journals/ci/LevesqueB87" mdate="2002-01-03">
<author>Hector J. Levesque</author>
<author>Ronald J. Brachman</author>
<title>Expressiveness and tractability in knowledge representation and reasoning.</title>
<pages>78-93</pages>
<year>1987</year>
<volume>3</volume>
<journal>Computational Intelligence</journal>
<url>db/journals/ci/ci3.html#LevesqueB87</url>
</article>
</dblp>
