Ivo Hammer, The Original Intention – Intention of the Original? Remarks on the Importance of Materiality Regarding the Preservation of the Tugendhat House and Other Buildings of Modernism, in: Dirk van den Heuvel-Maarten Mesman – Wido Quist – Bert Lemmens (eds.), The Challenge of Change. Dealing with the Legacy of the Modern Movement, Proceedings of the 10th International DOCOMOMO Conference, Amsterdam 2008, S. 369-374.