Francois Bisset Hawkins, Germany; the Spirit of Her History, Literature, Social Condition and National Economy, p. 53, London: John W. Parker, 1838 OCLC315389088.
Gazetteer of the World, vol. 4, p. 564, Edinburgh, London, Dublin: A. Fullerton, 1656 OCLC933154131.
Wilhelm Obermüller, Deutsch-Keltisches, geschichtlichgeographisches Wörterbuch, Berlin: Denicke's Verlag Link & Reinke, 1872 OCLC36754326.
