Waaijman, K.  (2003).  Image and Imagelessness. A Challenge to [the Modern] Devotion. In H.  Blommestijn, Caspers, C. M. A., & Hofman, R. (Red.), Spirituality renewed. Studies on Significant Representatives of the Modern Devotion (Vol. 10, pp. 29-40). Leuven: Peeters.