Philip Prentis Mats Sjöberg Markus Koskela Jorma Laaksonen Image Theft Detection with Self-Organising Maps. 495-504 2009 ICANN (1) http://dx.doi.org/10.1007/978-3-642-04274-4_52 conf/icann/2009-1 db/conf/icann/icann2009-1.html#PrentisSKL09