<hi xmlns="http://www.tei-c.org/ns/1.0" rend="bold">Bent, Margaret</hi> (1981): "Some criteria for establishing relationships between sources of late-medieval polyphony" in: Fenlon, Iain (ed.): <hi xmlns="http://www.tei-c.org/ns/1.0" rend="italic">Music in medieval and early modern Europe.</hi> Cambridge: Cambridge Univ. Press: 295-317.