Ott, J. S., & Trumbore Jones, A..  (2024).  The Medieval Clergy, 800-1250. A Sourcebook. Mediaeval Sources in Translation (Vol. 63, p. 536). Turnhout: Brepols.

Riches, T.  (2007).  Bishop Gerard I of Cambrai-Arras, the Three Orders, and the Problem of Human Weakness. In J. S.  Ott & Trumbore Jones, A. (Red.), The Bishop Reformed. Studies of Episcopal Power and Culture in the Central Middle Ages. Aldershot: Routledge.

Ott, J. S.  (2007).  'Both Mary and Martha': Bishop Lietbert of Cambrai and the Construction of Episcopal Sanctity in a Border Diocese around 1100. In J. S.  Ott & Trumbore Jones, A. (Red.), The Bishop Reformed. Studies of Episcopal Power and Culture in the Central Middle Ages (pp. 137-160). Routledge: Aldershot.