<?xml version="1.0"?>
<dblp>
<article key="journals/cl/LepageBR81" mdate="2003-11-27">
<author>M. T. Lepage</author>
<author>David T. Barnard</author>
<author>Andres Rudmik</author>
<title>Optimization of Hierarchical Directed Graphs.</title>
<pages>19-34</pages>
<year>1981</year>
<volume>6</volume>
<journal>Comput. Lang.</journal>
<number>1</number>
<url>db/journals/cl/cl6.html#LepageBR81</url>
</article>
</dblp>
