Bibliografie
. The friendship of William and Bernard: the development of human feeling. Cîteaux. Commentarii Cistercienses. 2018;69:101-109.
. Boniface and the Birth of a Christian Europe: In Pursuit of a New Biography. American Benedictine Review. 2014;65(1):42-67.
. Monastic and religious orders, c. 1100-c. 1350. In: . Christianity in Western Europe, c. 1100-c. 1500. Cambridge: Cambridge University Press; 2009. pp. 54-72.