<?xml version="1.0"?>
<dblp>
<article key="journals/ai/PapadimitriouS94" mdate="2003-11-19">
<author>Christos H. Papadimitriou</author>
<author>Martha Sideri</author>
<title>Default Theories that Always Have Extensions.</title>
<pages>347-357</pages>
<year>1994</year>
<volume>69</volume>
<journal>Artif. Intell.</journal>
<number>1-2</number>
<url>db/journals/ai/ai69.html#PapadimitriouS94</url>
</article>
</dblp>
