Everist, Mark. «Review: Helen Deeming and Frieda Van Der Heijden, Medieval Polyphony and Song (Cambridge, Cambridge University Press, 2023), 248 pp., ISBN 978-1-107-15116-1 ». Revista Portuguesa de Musicologia 10, no. 1 (junho 11, 2025): 151–154. Acedido outubro 17, 2025. https://rpm-ns.pt/index.php/rpm/article/view/486.