"Our State". State of Hesse. Archived from the original on 6 January 2013. Retrieved 14 April 2011.
"Bruttoinlandsprodukt". Volkswirtschaftliche Gesamtrechnungen (in German). Hessisches Statistisches Landesamt. 2012. Archived from the original on 14 September 2012. Retrieved 27 March 2013.
books.google.com
Gudmund Schütte, Our forefathers : The Gothonic nations : A manual of the ethnography of the Gothic, German, Dutch, Anglo-Saxon, Frisian and Scandinavian peoples, vol. 2 (1933), p. 191.
Christian Presche, Kassel im Mittelalter: Zur Stadtentwicklung bis 1367 vol. 1 (2013), p. 41.
"The Hessians, called, in the early history of Germany, Catti, lived in the present Hessia". The Popular Encyclopedia: Or, Conversations Lexicon vol. 3 (1862), p. 720. Occasional English use of Hessia is found until the present day, e.g. P. J. J. Welfens, Stabilizing and Integrating the Balkans, Springer Science & Business Media (2001), p. 119.
"Names and symbols of transfermium elements (IUPAC Recommendations 1997)". Pure and Applied Chemistry. 69.12 (1997), p. 2471. doi:10.1351/pac199769122471.
"Bruttoinlandsprodukt". Volkswirtschaftliche Gesamtrechnungen (in German). Hessisches Statistisches Landesamt. 2012. Archived from the original on 14 September 2012. Retrieved 27 March 2013.