Fowler, Harold North (1903). A History of Roman Literature. New York: D. Appleton and Co. p. 3. «The third or Imperial Period lasts from 14 A.D. to the beginning of the Middle Ages.»
books.google.com
Harrington, Karl Pomeroy; Pucci, Joseph Michael (1997). Mediaeval Latin (2nd edición). Chicago: University of Chicago Press. p. 67. ISBN0-226-31713-7. «The combination of features specific to Vulgar Latin and Ecclesiastical Latin had the effect, then, of transforming the language by the fourth century into something of extraordinary vigor.»
Du Cange, Charles du Fresne (1840). «Præfatio LXII». Glossarium mediæ et infimæ Latinitatis. Volume 1. Paris: Firmin Didot Fratres. p. 41. Consultado el 1 de junio de 2011.
