William, of Auvergne, Bishop of Paris, 1180–1249: Supplementum tractatus novi de poenitentia [Latin]
- Notes:
- 
                - Composite work, part to be attributed to William of Auvergne, part to Robert of Sorbonne, part to the influence of Hugh of Saint-Cher (see Diekstra, in RTAM (1994), pp. 22–41).
 
- Bibliography:
- 
                - Bloomfield, no. 1484.
- Ed. Guilielmi Alverni episcopi Parisiensis opera omnia, 2, Orléans/Paris/London 1674, Supplementum, pp. 229–247. (chapters 26)
- F. N. M. Diekstra, 'The Supplementum tractatus novi de poenitentia of Guillaume d'Auvergne and Jacques de Vitry's lost treatise on confession', RTAM 61 (1994), pp. 22–41.
 
- External links:
- Manuscripts:
- 
                - MS. Laud Misc. 172 (Digital facsimile online) — Composite manuscript
 
The above references reflect only the current coverage of the online catalogue and may not be comprehensive.