Tolong jelaskan mengenai Catatan dari Richard dari Cornwall

Jackson, Peter. "The Crusades of 1239–41 and their Aftermath". Bulletin of the School of Oriental and African Studies 50, 1 (1987), pp. 32–60..

Lewis, Frank R. "Beatrice of Falkenburg, the Third Wife of Richard of Cornwall". English Historical Review 52, 106 (1937), pp. 279–82.

Lower, Michael. The Barons' Crusade: A Call to Arms and Its Consequences. Philadelphia: University of Pennsylvania Press, 2005.

Painter, Sidney. "The Crusade of Theobald of Champagne and Richard of Cornwall, 1239–1241". R. L. Wolff; H. W. Hazard, A History of the Crusades, Volume II: The Later Crusades, 1189–1311, pp. 463–86. Madison: University of Wisconsin Press, 1969.

Roche, T. W. E. The King of Almayne: A 13th-Century Englishman in Europe. London: John Murray, 1966.

Schwab, Ingo. "The Charters of Richard of Cornwall for the Empire". Thirteenth Century England 12 (2009), pp. 183–92.

Vincent, Nicholas. "Richard, first earl of Cornwall and king of Germany (1209–1272)". Oxford Dictionary of National Biography. 2008 online [2004 print].

Weber, F. P.. "Richard, Earl of Cornwall, and His Coins as King of the Romans (1257–1271)". The Numismatic Chronicle and Journal of the Numismatic Society, Third Series 13 (1893), pp. 273–81.

Weiler, Björn. "Image and Reality in Richard of Cornwall's German Career". English Historical Review 113, 454 (1998), pp. 1111–42.

Charter given by Richard as German King to the town of Zürich, 20.11.1262. Photograph taken from the collections of the Lichtbildarchiv älterer Originalurkunden at Marburg University showing Richards's seal.