@Misc{DavidGuillamet2002,
author="David Guillamet
and B. Shiele
and Jordi Vitria",
title="Analyzing Non-negative Matrix Factorization for Image Classification.",
year="2002",
optnote="OR;MV",
optnote="exported from refbase (http://refbase.cvc.uab.es/show.php?record=292), last updated on Fri, 03 Feb 2012 19:49:09 +0100"
}