<?xml version="1.0"?>
<dblp>
<article key="journals/ita/Rupert92" mdate="2004-02-26">
<author>C. P. Rupert</author>
<title>Crossability of cancellative Kleene semigroups.</title>
<pages>151-162</pages>
<year>1992</year>
<volume>26</volume>
<journal>ITA</journal>
<url>db/journals/ita/ita26.html#Rupert92</url>
</article>
</dblp>
