Bibliografie
The Imago Christi in the Bishop, Priest, and Clergy. In , A Companion to Priesthood and Holy Orders in the Middle Ages (pp. 140–187). Leiden: Brill.
. (2016). 'Auf die Archive der Klöster ist besonders Sorgfalt zu nehmen'. Säkularisation und kirchliche Archive im Rheinland. In , Klosterkultur und Säkularisation im Rheinland (pp. 105-120). Essen: Klartext Verlagsgesellschaft.
. (2002). Säkularisation und kirchliche Archive im Rheinland. Annalen des Historischen Vereins für den Niederrhein insbesondere das alte Erzbistum Köln, 206, 185-208.
. (2003). . (2020).
Karolingische priesterexamens en het probleem van correctio op het platteland. Tijdschrift voor Geschiedenis, 125(2), 158-171.
. (2012). Shepherds of the Lord. Priests and Episcopal Statutes in the Carolingean Period. ( )Cultural encounters in late Antiquity ans the Middle Ages (Vol. 6, p. VIII+246). Turnhout: Brepols.
. (2007). Leading the Way to Heaven. Pastoral Care and Salvation in the Carolingian Period. The Medieval World (p. 286). Abingdon: Routledge.
. (2022). ‘Et hoc considerat episcopus, ut ipsi prespyteri non sint idiothae’. Carolingian local correctio and an unknown priests’ exam from the early ninth century. In , Religious Franks. Religion and Power in the Frankish Kingdoms: Studies in Honour of Mayke de Jong (pp. 162-180). Manchester: Manchester University Press.
. (2016). Correcting sinners, correcting texts: a context for the 'Paenitentiale pseudo-Theodori'. Early medieval Europe , 14, 23-40.
. (2006). . (2012).
. (2001).
The Role of Acoustics in the Performance of Renaissance Polyphony at the Collegiate Church of Saint Mary in Aachen. In Yearbook of the Alamire Foundation (Vol. 6, pp. 45-60). Peer: Alamire Foundation-Alamire Music Publishers.
. (2008). Reliquary Statuettes in Tongeren: Making Amidst Religious Conflict. Simiolus. Netherlands Quarterly for the History of Art, 42(3-4), 198-219.
. (2020). Notger et Gerbert. In , Évêque et prince. Notger et la Basse-Lotharingie aux alentours de l’an Mil (Vol. 2, pp. 343-353). Liège: Presses Universitaires de Liège.
. (2013). Des nains sur des épaules de géants. Maîtres et élèves au Moyen Âge (p. 351). Paris: Tallandier.
. (2006). Bishop Gerard I of Cambrai-Arras, the Three Orders, and the Problem of Human Weakness. In , The Bishop Reformed. Studies of Episcopal Power and Culture in the Central Middle Ages. Aldershot: Routledge.
. (2007). The Peace of God, the 'weakness' of Robert the Pious and the struggle for the German throne. 1023-1025. Early Medieval Europe, 18(2), 202-222.
. (2010). Episcopal Historiography as Archive. Some Reflections on the Autograph of the Gesta Episcoporum Cameracensium (Ms Den Haag KB 75 F 15). Jaarboek voor Middeleeuwse Geschiedenis, 10, 7-46.
. (2007). “Quasi-religious”: Vowesses. In , Medieval women religious c. 800-c. 1500. New Perspectives (pp. 90-104). Woodbridge: The Boydell Press.
. (2023). De jonge Willibrord. In , Willibrord tussen Ierland en Rome. Een bundel historische en muzikaal-liturgische bijdragen (pp. 35-44). Utrecht: De Keltische Draak.
. (1995). . (2015).
Hugo van der Goes’s Death of he Virgin and ther Modern Devotion. Analysis of a creative process. Oud Holland, 120(1), 1-30.
. (2007). . (2022).
Amitié et tragédie chez Gautier de Thérouanne. In , Le diocèse de Thérouanne au Moyen Âge. Actes de la journée d'études tenue à Lille, 3 mai 2007 (Vol. 39, pp. 99-106). Arras: Commission départementale d'histoire et d'archéologie du Pas-de-Calais.
. (2010). Composing a Historical Compilation in the Twelfth Century: The Author's Manuscript of the Genealogia Flandrensium comitum (or Flandria Generosa) from Saint-Bertin. Peregrinations. Journal of Medieval Art and Architecture, 4(4), 1-29.
. (2014).