From Manual to Automated Optical Recognition of Ancient Coins. - Maia Zaharieva; Martin Kampel; Klaus Vondrovec (VSMM, 2007)

Ancient Coin Classification Using Reverse Motif Recognition: Image-based classification of Roman Republican coins. - Hafeez Anwar; Sebastian Zambanini; Martin Kampel; Klaus Vondrovec (IEEE Signal Process. Mag., 2015)