In the original Cantus index for this manuscript, differentiae were indicated by their last note and an arbitrarily-assigned number within each mode. differentiae are written within the manuscript following each antiphon.
Campbell, Evan. Inventory of Köln, Erzbischöfliche Diözesan- und Dombibliothek, 1161. Edited by Andrew Mitchell and Debra Lacoste. 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-).
Images: Antiphonarium officii Ordinis Cisterciensis (pars hiemalis), Cod. 1161, Codices Electronici Ecclesiae Coloniensis (CEEC), Erzbishöfliche Diözesan- und Dombibliothek, Universität zu Köln
Standardized manuscript tonary completed by Rebecca Shaw (Dalhousie University) on February 22, 2018. Edited by Jennifer Bain, Sister Ilaria Culshaw, Andrea Klassen, and Brayden Olson and (Dalhousie University) on August 8, 2019 and Rebecca Shaw on August 11, 2019.