C. Baronius, Annales Ecclesiastici, v. 7, ed. A. Theiner, Bar-le-Duc 1864 (this is 19th c. edition of the volume orignally published in 1596 in Rome; this edition contains also the emendations of Antoine Pagi published for the first time in 1705).
R. Collins, Visigothic Spain, 409-711, Oxford, OX, UK; Malden, MA, USA 2004.
J. Orlandis, D. Ramos-Lissón, Die Synoden auf der Iberischen Halbinsel bis zum Einbruch des Islam (711), Paderborn 1981.
E.A. Thompson, The Goths in Spain, Oxford 1969.