Jordan, Wesley David. «An Introductory Description and Commentary Concerning the Identification of Four Twelfth Century Musico-Liturgical Manuscripts from the Cistercian Monastery of Las Huelgas, Burgos». Revista Portuguesa de Musicologia 2 (dezembro 20, 2014): 57–146. Acedido abril 16, 2026. https://www.rpm-ns.pt/index.php/rpm/article/view/78.