Referenced in:

• ed: 802 - Boulogne-sur-Mer, Bibliothèque municipale, 74 (82) 6, 10 [Letter by Burginda]
• mss: 802 - Boulogne-sur-Mer, Bibliothèque municipale, 74 (82)
• mss: 900.5 - Paris, Bibliothèque nationale de France, lat. 17177, fols. 5-12 (with Rome, Biblioteca Apostolica Vaticana, lat. 340, flyleaf) 3, 17 and nn. 17, 19