La Trobe University - Library: Medieval Music Database - Annual cycle of feasts of liturgical chant, liturgical polyphony and secular music of the late middle ages.

Ave Yesse stirps regalis

monophonic anonymous motet

Utrecht: Universiteitsbibliotheek 1846 (shelfmark 6 E 37), fol. IIA (1/1) (Cantus only).

HANDSCHIN, Jacques. 'Angelomontana polyphonica', Schweizerisches Jahrbuch für Musikwissenschaft, III (1928): 64-96.