<?xml version="1.0"?>
<dblp>
<article key="journals/dke/WilliamsK88" mdate="2003-11-27">
<author>M. Howard Williams</author>
<author>Quinzheng Kong</author>
<title>Incomplete information in a Deductive Database.</title>
<pages>197-220</pages>
<year>1988</year>
<volume>3</volume>
<journal>Data Knowl. Eng.</journal>
<url>db/journals/dke/dke3.html#WilliamsK88</url>
</article>
</dblp>
