Kroesen, J. E. A.  (2010).  Recentering Side Altars in Medieval Church Interiors: The Example of Late Romanesque Churches in Groningen. In J. E. A.  Kroesen & Schmidt, V. (Red.), K.  Smith (Vert.), The altar and its environment 1150-1400 (Vol. 4, pp. 147-167). Turnhout: Brepols.