Report on the state of the Polish movement in Rhineland and Westphalia and other areas of the German Reich and neighbouring countries in 1912, author: Bochum Police Commissioner Gerstein.
News. Leipzig, from Michael 1823 to March 1824, in: Allgemeine musikalische Zeitung, No. 13, 25 March 1824, column 204, Münchner Digitalisierungs-Zentrum
Oil painting by Joseph Brandt in Munich, in: Deutsche Kunst-Zeitung Die Dioskuren, Year 18, No. 10, Berlin 1873, page 78 (http://digi.ub.uni-heidelberg.de/diglit/dioskuren1873/0091), in German.