Annesley, Charles. The standard opera glass : containing the detailed plots of one hundred and thirty. celebrated operas. Sampson Low, Marston, Londres, Lemcke & Buechner, Nueva York, 1901.
Huebner, Steven, The Operas of Charles Gounod (Oxford 1990).
Holden, Amanda (Ed.), The New Penguin Opera Guide, New York: Penguin Putnam, 2001. ISBN 0-140-29312-4.