Müller, D..  (2026).  Katharer des Nordens. Eine Spurensuche entlang von Rhein, Maas und Seine (p. 304). Freiburg im Breisgau: Herder.

Caspers, C. M. A., Müller, D., & Kessler, J..  (2013).  In the Eyes of Others. The Modern Devotion in Germany and the Netherlands: Influencing and Appropriating. Church History and Religious Culture, 93(4), 489-503.