<?xml version="1.0"?>
<dblp>
<article key="journals/jcss/Vardi86" mdate="2003-11-20">
<author>Moshe Y. Vardi</author>
<title>Querying Logical Databases.</title>
<pages>142-160</pages>
<year>1986</year>
<volume>33</volume>
<journal>J. Comput. Syst. Sci.</journal>
<number>2</number>
<url>db/journals/jcss/jcss33.html#Vardi86</url>
</article>
</dblp>
