@Misc{DavidGuillamet2002,
author="David Guillamet
and Jordi Vitria",
title="Non-negative Matrix Factorization for Face Recognition.",
year="2002",
optnote="OR;MV",
optnote="exported from refbase (http://refbase.cvc.uab.es/show.php?record=280), last updated on Fri, 03 Feb 2012 19:48:40 +0100"
}