Literatuur
- Barral i Altet, Xavier, Belgique romane. Deel in de serie 'La nuit des temps' nr 71. La Pierre‑qui-Vire (Zodiaque), 1989. [411 blz. ISBN 2.7369.0166.5]. Hierin: blz. 159-163
- Hartog, E. den-, Romanesque Architecture and Sculpture in the Meuse Valley (bewerking van proefschrift "Twelfth-century architecture and sculpture in the diocese of Liège and the former duchy of Brabant: a formal analysis and a study of the origins, function and symbolism", University of London, 1988). Deel in de serie 'Maaslandse Monografieën, groot formaat'. Leeuwarden, Mechelen (Eisma), 1992. [229 blz. ISBN 90.74252.04.4]. Hierin: blz. 14