Hucher, E. L 'art gaulois ou les Gaulois d 'après leurs médailles. (Paris, 1868).
Gallic art and the Gauls according their medals.
Available online: http://books.google.com/books/about/L_art_gaulois_ou_les_Gaulois_d_apr%C3%A8s_le.html?id=YGllAYAR0PMC