(en) Rosita Rindler Schjerve, Diglossia and Power : Language Policies and Practice in the 19th Century Habsburg Empire, vol. 9, Berlin, Walter de Gruyter, coll. « Language, Power, and Social Process », , 351 p. (ISBN978-3-11-017654-4, lire en ligne), p. 75–76
(en) Robert Pentland Mahaffy, Francis Joseph I. : His Life and Times, Covent Garden, Duckworth, (lire en ligne), p. 39