Gilboa, Anat. Symbolism and the Interaction of the Real and the Ideal: Scenery in Early-Modern Netherlandish Graphic Art. Symbolic Landscapes. editor(s) Backhaus, Gary and Murungi, John. 251-264, Dordrecht, Year 2009.

Lilley, Keith D.. Cities of God? Medieval urban forms and their Christian symbolism. In Transactions of the Institute of British Geographers, (29) 296-313, Year 2004.