<?xml version="1.0"?>
<dblp>
<article key="journals/tcs/GrigorievH03" mdate="2003-11-19">
<author>Dima Grigoriev</author>
<author>Edward A. Hirsch</author>
<title>Algebraic proof systems over formulas.</title>
<pages>83-102</pages>
<year>2003</year>
<volume>1</volume>
<journal>Theor. Comput. Sci.</journal>
<number>303</number>
<ee>http://dx.doi.org/10.1016/S0304-3975(02)00446-2</ee>
<url>db/journals/tcs/tcs303.html#GrigorievH03</url>
</article>
</dblp>
