Referenced in:

• mss: 184 - Cambridge, Trinity College, R. 14. 50 (920) col. 200
• st: 615 - Oxford, Bodleian Library, Douce 125 (S.C. 21699) 870 [Altercatio duorum geometricorum]
• st: 633 - Oxford, Bodleian Library, Hatton 76 (S.C. 4125), fols. 68-139 col. 844 [lapidary]