- Anastasio,
Anastasio, el Bibliotecario, aproximadamente 810-aproximadamente 878 (Autor Personal)
- Anastase, le Bibliothécaire, approximately 810-approximately 878
- Anastasius, Bibliothecarius, approximately 810-approximately 878
- Anastasius, the Librarian, approximately 810-approximately 878
Westerbergh, U. Anastasius Bibliothecarius, Sermo Theodori Studitae de Sancto Bartholomeo Apostolo, 1963.
New Catholic encyclopedia. Second edition: volume 1, pages 389-390 (Anastasius the Librarian; variant forms of name: Anastasius Bibliothecarius, Anastase le Bibliothécaire; born ca. 810-817; died ca. 878; learned Greek at an early age; stood as antipope for a few days to Benedict III in 855, but later reconciled to him and worked zealously for the Roman See after that, especially in relations with Constantinople; was named librarian of the Roman Church in late 867; until the late 19th century he was thought to be two different people: Anastasius the Cardinal; and Anastasius the Librarian)
Encyclopedia Britannica, 15th edition (Anastasius the Librarian, Latin Anastasius Bibliothecarius, born ca. 810, died ca. 878)
