<hi xmlns="http://www.tei-c.org/ns/1.0" rend="bold">Berger, Karol</hi> (1987): <hi xmlns="http://www.tei-c.org/ns/1.0" rend="italic">Musica ficta. Theories of accidental inflections in vocal polyphony from Marchetto da Padova to Gioseffo Zarlino.</hi> Cambridge: Cambridge Univ. Press.