(en) T.R. Potter, The History and Antiquities of Charnwood Forest: With an Appendix on the Geology, Botany and Ornithology of the District, Hamilton, Adams, (lire en ligne), 166.
(en) D. Brown, Hugh de Lacy, First Earl of Ulster: Rising and Falling in Angevin Ireland, Boydell Press, coll. « Irish historical monographs series », (ISBN978-1-78327-134-4, lire en ligne), p. 244.
(en) W. Dugdale, Monasticon Anglicanum...a History of the Abbies and Other Monasteries...and Cathedral and Collegiate Churches...in England and Wales, Bohn, coll. « Monasticon Anglicanum...a History of the Abbies and Other Monasteries...and Cathedral and Collegiate Churches...in England and Wales », (lire en ligne), p. 564–IA7
(en) L.L. Gee, Women, Art, and Patronage from Henry III to Edward III: 1216-1377, Boydell Press, (ISBN978-0-85115-861-7, lire en ligne), p. 168.
(en) Gillian Kenny, « The Women of County Louth in the Later Medieval Period, 1170-1540 », Journal of the County Louth Archaeological and Historical Society, vol. 26, , p. 579–594 (JSTOR27730023).
womensmuseumofireland.ie
« Roesia de Verdun », Women's Museum of Ireland, (consulté le ).