<?xml version="1.0"?>
<dblp>
<article key="journals/tog/RamamoorthiMB07" mdate="2007-03-06">
<author>Ravi Ramamoorthi</author>
<author>Dhruv Mahajan</author>
<author>Peter N. Belhumeur</author>
<title>A first-order analysis of lighting, shading, and shadows.</title>
<year>2007</year>
<volume>26</volume>
<journal>ACM Trans. Graph.</journal>
<number>1</number>
<ee>http://doi.acm.org/10.1145/1189762.1189764</ee>
<url>db/journals/tog/tog26.html#RamamoorthiMB07</url>
</article>
</dblp>
