<?xml version="1.0"?>
<dblp>
<article key="journals/sigpro/ValpolaHK04" mdate="2007-03-21">
<author>Harri Valpola</author>
<author>Markus Harva</author>
<author>Juha Karhunen</author>
<title>Hierarchical models of variance sources.</title>
<pages>267-282</pages>
<year>2004</year>
<volume>84</volume>
<journal>Signal Processing</journal>
<number>2</number>
<ee>http://dx.doi.org/10.1016/j.sigpro.2003.10.014</ee>
<url>db/journals/sigpro/sigpro84.html#ValpolaHK04</url>
</article>
</dblp>
