<?xml version="1.0"?>
<dblp>
<article key="journals/fuin/Szalas96" mdate="2003-11-27">
<author>Andrzej Szalas</author>
<title>On Natural Deduction in First-Ortder Fixpoint Logics.</title>
<pages>81-94</pages>
<year>1996</year>
<volume>26</volume>
<journal>Fundam. Inform.</journal>
<number>1</number>
<url>db/journals/fuin/fuin26.html#Szalas96</url>
</article>
</dblp>
