Gerard David: purity of vision in anageof transition (页面存档备份,存于互联网档案馆), an exhibition catalog from The Metropolitan Museum of Art (fully available online
Kings and Kingdoms, p. 61. Yorke, Kings and Kingdoms, p. 61. Yorke, Kings and Kingdoms of Anglo-Saxon England, p. 62. Yorke, Kings and Kingdoms of Early
Conquest of England, 991–1017 illustrated. Boydell Press. 2003 [2024-02-21]. ISBN 978-0851159287. (原始内容存档于2024-02-21). Jarman, Cat. River Kings: The Vikings
Kings 18:4 "Modern exegesis holds two different opinions in regard to the meaning of the word "Nehushtan," which is explained either as denoting an image