Enright 1979, pp. 291–301. Enright, Michael J. (1979). "Charles the Bald and Æthelwulf of Wessex: Alliance of 856 and Strategies of Royal Succession". Journal of Medieval History. 5 (1): 291–302. doi:10.1016/0304-4181(79)90003-4. ISSN0304-4181.
Nelson 1991a, p. 58, n. 62; Dumville 1992, p. 43; Keynes 1994, pp. 1123–1126. Nelson, Janet (1991a). "Reconstructing a Royal Family: Reflections on Alfred from Asser, Chapter 2". In Wood, Ian; Lund, Niels (eds.). People and places in Northern Europe 500–1600 : Essays in Honour of Peter Hayes Sawyer. Woodbridge, UK: Boydell Press. pp. 48–66. ISBN978-0-851-15547-0. Dumville, David (1992). Wessex and England from Alfred to Edgar: Six Essays on Political, Cultural, and Ecclesiastical Revival. Woodbridge, UK: Boydell Press. ISBN978-0-85115-308-7. Keynes, Simon (November 1994). "The West Saxon Charters of King Æthelwulf and his sons". English Historical Review. 109 (434): 1109–1149. doi:10.1093/ehr/cix.434.1109. ISSN0013-8266.
Keynes 1994, p. 1123. Keynes, Simon (November 1994). "The West Saxon Charters of King Æthelwulf and his sons". English Historical Review. 109 (434): 1109–1149. doi:10.1093/ehr/cix.434.1109. ISSN0013-8266.
Keynes 1994, p. 1129. Keynes, Simon (November 1994). "The West Saxon Charters of King Æthelwulf and his sons". English Historical Review. 109 (434): 1109–1149. doi:10.1093/ehr/cix.434.1109. ISSN0013-8266.
Nelson 1997, p. 143. Nelson, Janet L. (1997). "The Franks and the English in the Ninth Century Reconsidered"(PDF). In Szarmach, Paul E.; Rosenthal, Joel T. (eds.). The Preservation and Transmission of Anglo-Saxon Culture: Selected Papers from the 1991 Meeting of the International Society of Anglo-Saxonists. Kalamazoo, Michigan: Medieval Institute Publications, Western Michigan University. pp. 141–158. ISBN978-1-879288-90-4. Archived(PDF) from the original on 3 January 2017.
Nelson 1997, p. 143. Nelson, Janet L. (1997). "The Franks and the English in the Ninth Century Reconsidered"(PDF). In Szarmach, Paul E.; Rosenthal, Joel T. (eds.). The Preservation and Transmission of Anglo-Saxon Culture: Selected Papers from the 1991 Meeting of the International Society of Anglo-Saxonists. Kalamazoo, Michigan: Medieval Institute Publications, Western Michigan University. pp. 141–158. ISBN978-1-879288-90-4. Archived(PDF) from the original on 3 January 2017.
Enright 1979, pp. 291–301. Enright, Michael J. (1979). "Charles the Bald and Æthelwulf of Wessex: Alliance of 856 and Strategies of Royal Succession". Journal of Medieval History. 5 (1): 291–302. doi:10.1016/0304-4181(79)90003-4. ISSN0304-4181.
Nelson 1991a, p. 58, n. 62; Dumville 1992, p. 43; Keynes 1994, pp. 1123–1126. Nelson, Janet (1991a). "Reconstructing a Royal Family: Reflections on Alfred from Asser, Chapter 2". In Wood, Ian; Lund, Niels (eds.). People and places in Northern Europe 500–1600 : Essays in Honour of Peter Hayes Sawyer. Woodbridge, UK: Boydell Press. pp. 48–66. ISBN978-0-851-15547-0. Dumville, David (1992). Wessex and England from Alfred to Edgar: Six Essays on Political, Cultural, and Ecclesiastical Revival. Woodbridge, UK: Boydell Press. ISBN978-0-85115-308-7. Keynes, Simon (November 1994). "The West Saxon Charters of King Æthelwulf and his sons". English Historical Review. 109 (434): 1109–1149. doi:10.1093/ehr/cix.434.1109. ISSN0013-8266.
Yorke 1984, p. 64. Yorke, Barbara (1984). "The Bishops of Winchester, the Kings of Wessex and the Development of Winchester in the Ninth and Early Tenth Centuries". Proceedings of the Hampshire Field Club and Archaeological Society. 40: 61–70. ISSN0142-8950.
Keynes 1994, p. 1123. Keynes, Simon (November 1994). "The West Saxon Charters of King Æthelwulf and his sons". English Historical Review. 109 (434): 1109–1149. doi:10.1093/ehr/cix.434.1109. ISSN0013-8266.
Keynes 1994, p. 1129. Keynes, Simon (November 1994). "The West Saxon Charters of King Æthelwulf and his sons". English Historical Review. 109 (434): 1109–1149. doi:10.1093/ehr/cix.434.1109. ISSN0013-8266.
Grierson and Blackburn 1986, p. 337; Lawrence 1893, pp. 40–45; Lawrence 1905, pp. 407–409; Naismith 2011, p. 34. Grierson, Philip; Blackburn, Mark (1986). Medieval European Coinage. Cambridge, UK: Cambridge University Press. ISBN0-521-26009-4. Lawrence, L. A. (1893). "Coinage of Aethelbald". The Numismatic Chronicle and Journal of the Numismatic Society. 3rd. 13: 40–45. ISSN2054-9172. Lawrence, L. A. (1905). "Forgery in Relation to Numismatics". British Numismatic Journal. 2: 397–409. OCLC1537348. Naismith, Rory (2011). The Coinage of Southern England 796–865. Vol. 1. London: Spink & Son. ISBN978-1-907427-09-1.
Giles 1849, p. 187. Giles, J. A., ed. (1849). Roger of Wendover's Flowers of History. Vol. 1. London: Henry G. Bohn. OCLC633664910.