Migne Patrologia Latina Tomus 89
Adnotatiuncula historica (Petrus diaconus), J. P. Migne
(1049C)Cyprianus presbyter sub Petronace abbate in eodem (Cassinensi) coenobio monachus factus, de B. Benedicti miraculis hymnum in ejus festivitate cantandum (1050C)descripsit. Claruit autem temporibus Leonis, Constantini et Irene imperatorum.