Bajohr, «The «Aryanization», 242-5; Peter Hayes, «Fritz Roessler and Nazism: The Observations of a German Industrialist, 1930-37», Central European History, 20 (1987), 58-83; более подробно см. в Peter Hayes, From Cooperation to Complicity. Degussa in the Third Reich (New York, 2005).
