Cologne

1. May, Roland (2009): Discovering Construction as an Art – The 'Cologne Bridge Quarrel'. Presented at: Third International Congress on Construction History, Brandenburg University of Technology Cottbus, Germany , 20th-24th May 2009.
2. Wohn- und Atelierhaus in Köln. In: Detail - Zeitschrift für Architektur + Baudetail, v. 41, n. 8 (December 2001), pp. 1517-1520.