@TechReport{AntonioLopez1998,
author="Antonio Lopez
and Joan Serrat",
title="Ridges and Valleys in Image Analysis",
year="1998",
optnote="ADAS",
optnote="exported from refbase (http://refbase.cvc.uab.es/show.php?record=533), last updated on Thu, 30 Jun 2011 12:06:03 +0200"
}