"Internet INPI". bases-brevets19e.inpi.fr (in French). Retrieved 2017-02-02.
kammertöns.info
1806 by his own account, 1803 in the register of the Paris Conservatoire. Source: Musik in Geschichte und Gegenwart (1986), pp. 33940 (vol. 06, p. 293). Note translated from the German Wikipedia page for Henri Herz. The date is given as 2 January 1806 by Christoph Kammertönshere, based on a marriage certificate from 1865.
Robert Eitner, "Herz, Henri" in: Allgemeine Deutsche Biographie, herausgegeben von der Historischen Kommission bei der Bayerischen Akademie der Wissenschaften, Band 50 (1905), S. 266, Digitale Volltext-Ausgabe in Wikisource, URL: https://de.wikisource.org/w/index.php?title=ADB:Herz,_Henri&oldid=2511296 (Version 10 February 2018, 14:18 UTC)