@Misc{V.Valev1997,
author="V. Valev
and B. Sankur
and Petia Radeva",
title="Generalized Non-Reducible Descriptors.",
year="1997",
optnote="MILAB",
optnote="exported from refbase (http://refbase.cvc.uab.es/show.php?record=65), last updated on Mon, 27 Jun 2011 13:29:25 +0200"
}