Söder, Francis (2006). "Hall Culture and Event instead of Memorial and Industrial Culture?". In Kaestle, Thomas; Walz, Manfred; Wende, Ovis (eds.). Art + Planning = Urbanity?(PDF) (in German). Fachhochschule Dortmund. Archived from the original(PDF) on 2017-03-13. Retrieved 2017-03-13.
Söder, Francis (2006). "Hall Culture and Event instead of Memorial and Industrial Culture?". In Kaestle, Thomas; Walz, Manfred; Wende, Ovis (eds.). Art + Planning = Urbanity?(PDF) (in German). Fachhochschule Dortmund. Archived from the original(PDF) on 2017-03-13. Retrieved 2017-03-13.