R. Huber-Mörk, M. Nölle, M. Rubik, M. Hödlmoser, S. Zambanini, M. Kampel:
"Automatic Coin Classification and Identification";
in: "Advances in Object Recognition Systems", InTech, 2012, ISBN: 978-953-51-0598-5, 30 pages.
http://dx.doi.org/10.5772/35795