<?xml version="1.0"?>
<dblp>
<article key="journals/cacm/Allen83" mdate="2003-11-20">
<author>James F. Allen</author>
<title>Maintaining Knowledge about Temporal Intervals.</title>
<pages>832-843</pages>
<year>1983</year>
<volume>26</volume>
<journal>Commun. ACM</journal>
<number>11</number>
<url>db/journals/cacm/cacm26.html#Allen83</url>
</article>
</dblp>
