Baldwin, C. S., Medieval rhetoric and poetic. New York, 1928.

Bardenhewer, O., Geschichte der altkirchlichen Literatur, 5 vols. Freiburg in Breisgau, 1912-1932.

Beck, C., Mittellateinische Dichtung. Berlin, 1927.

Benson, L. F., Hymnody of the Christian church. New York, 1927.

Biraghi, L., Inni sinceri e carmi di Sant’Ambrogio. Milano, 1862.

Blume, C., Articles “Hymn”, “Hymnody and Hymnology.” Cath. Enc.

Coulter, C. C., “Latin hymns of the Middle Ages”, Studies in Philology, 21 (1924) 571-585.

DeGhellinck, J., S. J., Littérature Latine au Moyen Age, 2 vols. Paris, 1939.

——, Littérature Latine au XIIe Siècle, 2 vols. Brussels, 1946.

De Labriolle, P., Histoire de la Littérature latine chrétienne. Paris, 1924. Translation by H. Wilson, History and Literature of Christianity from Tertullian to Boethius. New York, 1925.