<?xml version="1.0"?>
<dblp>
<article key="journals/cacm/KatzA97" mdate="2011-06-07">
<author>James E. Katz</author>
<author>Philip Aspden</author>
<title>Motives, Hurdles, and Dropouts.</title>
<pages>97-106</pages>
<year>1997</year>
<volume>40</volume>
<journal>Commun. ACM</journal>
<number>4</number>
<url>db/journals/cacm/cacm40.html#KatzA97</url>
<ee>http://doi.acm.org/10.1145/248448.248464</ee>
</article>
</dblp>
