<?xml version="1.0"?>
<dblp>
<article key="journals/logcom/HillLS90" mdate="2011-06-29">
<author>Patricia M. Hill</author>
<author>John W. Lloyd</author>
<author>John C. Shepherdson</author>
<title>Properties of a Pruning Operator.</title>
<pages>99-143</pages>
<year>1990</year>
<volume>1</volume>
<journal>J. Log. Comput.</journal>
<number>1</number>
<url>db/journals/logcom/logcom1.html#HillLS90</url>
<ee>http://dx.doi.org/10.1093/logcom/1.1.99</ee>
</article>
</dblp>
