<?xml version="1.0"?>
<dblp>
<article key="journals/ai/HoggW94" mdate="2003-11-19">
<author>Tad Hogg</author>
<author>Colin P. Williams</author>
<title>The Hardest Constraint Problems: A Double Phase Transition.</title>
<pages>359-377</pages>
<year>1994</year>
<volume>69</volume>
<journal>Artif. Intell.</journal>
<number>1-2</number>
<url>db/journals/ai/ai69.html#HoggW94</url>
</article>
</dblp>
