<?xml version="1.0"?>
<dblp>
<article key="journals/tissec/ZhangNCS08" mdate="2008-02-05">
<author>Xinwen Zhang</author>
<author>Masayuki Nakae</author>
<author>Michael J. Covington</author>
<author>Ravi S. Sandhu</author>
<title>Toward a Usage-Based Security Framework for Collaborative Computing Systems.</title>
<year>2008</year>
<volume>11</volume>
<journal>ACM Trans. Inf. Syst. Secur.</journal>
<number>1</number>
<ee>http://doi.acm.org/10.1145/1330295.1330298</ee>
<url>db/journals/tissec/tissec11.html#ZhangNCS08</url>
</article>
</dblp>
