In the original Cantus index for this manuscript, differentiae were assigned numbers within each mode.
Livljanic, Katarina. Inventory of Montecassino, Monumento Nazionale di Montecassino - Biblioteca, 542. Edited by Keith Glaeske. In: Cantus: A Database for Latin Ecclesiastical Chant: Inventories of Chant Sources. Directed by Debra Lacoste (2011-), Terence Bailey (1997-2010), and Ruth Steiner (1987-1996). Web developer, Jan Kolácek (2011-).
Catholic Church, and Katarina Livljanic. Montecassino, Archivio dell'Abbazia, Ms. 542: antiphonaire, 12e`me sie`cle. Facsimile. Solesmes : Abbaye Saint-Pierre, 2014.
Standardized manuscript tonary completed by Rebecca Shaw (Dalhousie University) on August 7, 2018. Edited by Jennifer Bain, Sister Ilaria Culshaw, Lucia Denk, Brayden Olson, and Rebecca Shaw (Dalhousie University) on June 18, 2019.