<?xml version="1.0"?>
<dblp>
<article key="journals/jsyml/BankstonR90" mdate="2003-11-20">
<author>Paul Bankston</author>
<author>Wim Ruitenburg</author>
<title>Notions of Relative Ubiquity for Invariant Sets of Relational Structures.</title>
<pages>948-986</pages>
<year>1990</year>
<volume>55</volume>
<journal>J. Symb. Log.</journal>
<number>3</number>
<url>db/journals/jsyml/jsyml55.html#BankstonR90</url>
</article>
</dblp>
