<?xml version="1.0"?>
<dblp>
<article key="journals/acta/IbarraK74" mdate="2003-11-25"> 
<author>Oscar H. Ibarra</author>
<author>Chul E. Kim</author>
<title>On 3-Head Versus 2-Head Finite Automata</title>
<journal>Acta Inf.</journal>
<volume>4</volume> 
<year>1974</year> 
<pages>193-200</pages>
<url>db/journals/acta/acta4.html#IbarraK74</url>
</article>

</dblp>
