@Misc{DavidGuillamet2001,
author="David Guillamet
and Jordi Vitria",
title="Non-negative Matrix Factorization to Extract Part-Based Representations.",
year="2001",
optnote="OR;MV",
optnote="exported from refbase (http://refbase.cvc.uab.es/show.php?record=100), last updated on Fri, 03 Feb 2012 19:51:35 +0100"
}