Referenced in:

• st: 237 - Durham, Cathedral Library, B. II. 30 (the ‘Durham Cassiodorus’) 18-22 [links of MS with Alcuin]
• mss: 292 - London, British Library, Add. 37518, fols. 116-17 11 n. 26
• mss: 808 - Brussels, Bibliothèque royale, 8654-8672 47 n. 109