Ricossa, Luca (2011–12), Luca Ricossa ([1]), "Antiphonale Ambrosianum" (complete edition of the medieval ambrosian antiphoner, with original musical notation and complete liturgical context). Voll. I - II - III - IV - (V)
Development of notation styles is discussed at Dolmetsch online, accessed 4 July 2006
grovemusic.com
McKinnon, James W.: "Christian Church, music of the early", Grove Music Online ed. L. Macy (Accessed 11 July 2006), (subscription access)Архивирано 16 мај 2008 на сајту Wayback Machine
McKinnon, James W.: "Christian Church, music of the early", Grove Music Online ed. L. Macy (Accessed 11 July 2006), (subscription access)Архивирано 16 мај 2008 на сајту Wayback Machine