<?xml version="1.0"?>
<dblp>
<article key="journals/jlp/JagerS93" mdate="2003-11-27">
<author>Gerhard J&#228;ger</author>
<author>Robert F. St&#228;rk</author>
<title>The Defining Power of Stratified and Hierarchical Logic Programs.</title>
<pages>55-77</pages>
<year>1993</year>
<volume>15</volume>
<journal>J. Log. Program.</journal>
<number>1&amp;2</number>
<url>db/journals/jlp/jlp15.html#JagerS93</url>
</article>
</dblp>
