The Spiritual Franciscans.. From Protest to Persecution in the Century After Saint Francis, 2003. ,
So Great a Light, So Great a Smoke: The Beguin Heretics of Languedoc, p.32, 2008. ,
Pope John XXII and his Franciscan Cardinal, Bertrand de la Tour and the Apostolic Poverty Controversy, 2003. ,
Essai d'histoire sociale, pp.85-100, 1325. ,