Jan-Werner Müller (2002). Nationhood in German legislation. Memory and Power in Post-War Europe: Studies in the Presence of the Past. Cambridge University Press. pp. 254–256. ISBN052100070X. สืบค้นเมื่อ 30 January 2015.
Christoph Bergner, Secretary of State in Germany's Bureau for Inner Affairs, outlines the stance of the respective governmental institutions in Deutschlandfunk on 29 November 2006, [1]