Laird, P. R. «Literary Evidence and Ceremonial Use of the Villancico at San Lorenzo Del Escorial through the Late Seventeenth Century». Inter-American Music Review, vol. 17, n.º 1 - 2, mayo de 2019, pp. pp. 151 - 156, https://iamr.uchile.cl/index.php/IAMR/article/view/53416.