Charles Julian Bishko, "Portuguese Pactual Monasticism in the Eleventh Century: The Case of Sao Salvador De Vacariça," (Lisbon: Editorial Estampa, 1982). Julian of Toledo, , in , V, 486-535; og cf. Dahn, , V, 207-212; 217-18; R. Altamira, , II, 179. Charles Morris, 1898, Philadelphia: J.B. Lippincott Company.