Literatuur
- Dodwell, C.R., Yhe Pictorial Arts of the West 800 - 1200, deel in de serie 'Pelican History of Art'. New Haven & London (Yale University Press), 1993 [462 blz. ISBN 0.300.05348.7 & 0.300.06493.4]. Hierin "Mosaics and Painting in Italy and Sicily: 900-1200": blz. 157-190