Koutsiaris, Epameinondas A., Christos Alamanis, Aristotle Eftychiadis, and Anastasios Zervas. “Castrati Singers: Surgery for Religion and Art”. Italian Journal of Anatomy and Embryology 119, no. 2 (November 7, 2014): 106–110. Accessed November 25, 2024. https://oajournals.fupress.net/index.php/ijae/article/view/1221.