Beyssac, Gabriel M. Unpublished work on chant series in the Pro Defunctis Office, as referenced in Knud Ottosen, The
Responsories and Versicles of the Latin Office of the Dead, p. v. Aarhus: Aarhus University Press, 1993.
Lacoste, Debra, and Stafleu, Gerard. "Similarities in Responsory
Series Represented by Hierarchical Diagrams: New Tools for Determining Manuscript
Affiliation," 29 pp. In Antiphonaria: Studien zu Quellen und Gesängen
des mittelalterlichen Offiziums. Regensburger Studien zur Musikgeschichte.
Vol. 7. Edited by David Hiley. Tutzing: Hans Schneider Verlag, 2009.
LeRoux, Raymond. "Les répons << de psalmis >> pour
les matines, de l'Épiphanie a la Septuagésime." Études grégoriennes 6
(1963): pp. 39-148.
