Plainsong in the age of polyphony
Plainsong in the age of polyphony, ed. Th.F. Kelly (Cambridge 1992)
Among the contributions:
J. Bloxam: Sacred polyphony and local traditions of liturgy and plainsong: reflections on music by Jacob Obrecht, pp. 140-177.
R. Sherr: The performance of chant in the Renaissance and its interactions with polyphony, pp. 178-208.