Otto IV, Holy Roman Emperor (English Wikipedia)
Analysis of information sources in references of the Wikipedia article "Otto IV, Holy Roman Emperor" in English language version.
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archive.org
- Norgate 1887, p. 373 n. 1. Norgate, Kate (1887). England Under the Angevin Kings. Macmillan.
- Keefe 1983, pp. 100–01. Keefe, Thomas K. (1983). Feudal Assessments and the Political Community Under Henry II and His Sons. University of California Press. ISBN 9780520045828.
- Norgate 1887, p. 341. Norgate, Kate (1887). England Under the Angevin Kings. Macmillan.
- Eduard August Winkelmann (1873). Philipp von Schwaben und Otto IV. von Braunschweig. Duncker & Humblot.
- Commire, Anne, ed. (8 October 1999). "Beatrice of Swabia (1198–1235)". Women in World History. Gale. p. 309. ISBN 978-0-7876-4061-3. Retrieved 8 June 2017 – via Encyclopedia.com.
books.google.com
- Bernd Schneidmüller; Stefan Weinfurter (2003). Die deutschen Herrscher des Mittelalters: historische Portraits von Heinrich I. bis Maximilian I. (919–1519). C.H.Beck. pp. 272–. ISBN 978-3-406-50958-2.
- Duranöz Özlem (2009). Die Doppelwahl von 1198 und seine diversen Wahlgänge: Philipp von Schwaben gegen Otto von Braunschweig. GRIN Verlag. ISBN 978-3-640-31571-0.
- Fryde, Natalie (2001). Why Magna Carta?: Angevin England Revisited. LIT Verlag Münster. p. 17. ISBN 9783825856571.
britannica.com
- "Otto IV | Holy Roman emperor". Encyclopedia Britannica. Retrieved 9 November 2019.
wikisource.org
en.wikisource.org
- The Catholic Encyclopedia Kampers, Franz (1911). . In Herbermann, Charles (ed.). Catholic Encyclopedia. Vol. 11. New York: Robert Appleton Company. gives his birthplace as Argentan in Normandy, which was one of the royal courts of Matilda's father, Henry II of England. This is based upon Otto's birthdate being circa 1182, and placing it during his father's exile from Germany at the court of his father-in-law.
Herbermann, Charles, ed. (1913). "Pope Innocent III". Catholic Encyclopedia. New York: Robert Appleton Company.
