<?xml version="1.0"?>
<dblp>
<article key="journals/entcs/deLiguor02" mdate="2004-09-20">
<author>Ugo de'Liguoro</author>
<title>Subtyping in Logical Form.</title>
<year>2002</year>
<volume>70</volume>
<journal>Electr. Notes Theor. Comput. Sci.</journal>
<number>1</number>
<ee>http://www1.elsevier.com/gej-ng/31/29/23/125/51/show/Products/notes/index.htt#006</ee>
<url>db/journals/entcs/entcs70.html#deLiguor02</url>
</article>
</dblp>
