Canto Gregoriano
Notazione Gregoriana (in Inglese)
PEROTIN Magister (ca. 1160-1238) Home Page
SOLESMES-Abbaye Saint Pierre [Site officiel].
Gregorian chant Princeton Home page
CANTUS PLANUS Archiv Regensburg.
REGENSBURG-Homepage des Instituts für Musikwissenschaft.
Fonti
EXPLORING MEDIEVAL MUSIC MANUSCRIPTS [Erik Kaashoek]
The Music of the Fourteenth Century (France)
THE Dom MOCQUEREAU FOUNDATION Microfilm Collection.