<?xml version="1.0"?>
<dblp>
<article key="journals/cacm/Winkler09e" mdate="2009-09-18">
<author>Peter Winkler</author>
<title>Puzzled - Solutions and sources.</title>
<pages>110</pages>
<year>2009</year>
<volume>52</volume>
<journal>Commun. ACM</journal>
<number>9</number>
<ee>http://doi.acm.org/10.1145/1562164.1562191</ee>
<url>db/journals/cacm/cacm52.html#Winkler09e</url>
</article>
</dblp>
