1. Paris, Bibliothèque Nationale lat. 17436, an antiphonary from the monastery of Saint-Corneille de Compiègene. See Réné HesbertCorpus Antiphonaloim Officii, I, p. XVII, Rome Herder 1968
2. Dom Eugene Cardine identifies 16 different neums for the torculus in his Table of neumatic signs from St Gall (Ms Einsiedeln 121). See hisGregorian Semiologytranslated by Robert M Fowels Solesmes 1982 pp11–12
3. See D HileyWestern Plainchant: A HandbookOxford Clarendon Press 1993 p622