<?xml version="1.0"?>
<dblp>
<article key="journals/tc/NtafosH81" mdate="2003-11-20">
<author>Simeon C. Ntafos</author>
<author>S. Louis Hakimi</author>
<title>On Structured Digraphs and Program Testing.</title>
<pages>67-77</pages>
<year>1981</year>
<volume>30</volume>
<journal>IEEE Trans. Computers</journal>
<number>1</number>
<url>db/journals/tc/tc30.html#NtafosH81</url>
</article>
</dblp>
