<?xml version="1.0"?>
<dblp>
<article key="journals/tocl/GroheS02" mdate="2003-11-21">
<author>Martin Grohe</author>
<author>Luc Segoufin</author>
<title>On first-order topological queries.</title>
<pages>336-358</pages>
<year>2002</year>
<volume>3</volume>
<journal>ACM Trans. Comput. Log.</journal>
<number>3</number>
<ee>http://doi.acm.org/10.1145/507382.507384</ee>
<url>db/journals/tocl/tocl3.html#GroheS02</url>
</article>
</dblp>
