<?xml version="1.0"?>
<dblp>
<article key="journals/acta/HalavaH07" mdate="2007-09-11">
<author>Vesa Halava</author>
<author>Mika Hirvensalo</author>
<title>Improved matrix pair undecidability results.</title>
<pages>191-205</pages>
<year>2007</year>
<volume>44</volume>
<journal>Acta Inf.</journal>
<number>3-4</number>
<ee>http://dx.doi.org/10.1007/s00236-007-0047-y</ee>
<url>db/journals/acta/acta44.html#HalavaH07</url>
</article>
</dblp>
