<?xml version="1.0"?>
<dblp>
<article key="journals/ipl/LeindersTB04" mdate="2004-07-06">
<author>Dirk Leinders</author>
<author>Jerzy Tyszkiewicz</author>
<author>Jan Van den Bussche</author>
<title>On the expressive power of semijoin queries.</title>
<pages>93-98</pages>
<year>2004</year>
<volume>91</volume>
<journal>Inf. Process. Lett.</journal>
<number>2</number>
<ee>http://dx.doi.org/10.1016/j.ipl.2004.03.011</ee>
<url>db/journals/ipl/ipl91.html#LeindersTB04</url>
</article>
</dblp>
