^Chisholm, Hugh, ed. (1911). "Steffani, Agostino" . Encyclopædia Britannica. Vol. 25 (11th ed.). Cambridge University Press. pp. 869–870, see page 869. For the same theatre he composed La Lotta d'Ercole con Achilleo in 1689, La Superbia d'Alessandro in 1690, Orlando generoso in 1691....
^Colin Timms (2003). Polymath of the Baroque: Agostino Steffani and His Music. p. 229. ISBN0195348273. "Ariosto, Mauro, and Steffani: Orlando generoso (Hanover, 1691) is the only three-act opera by Mauro and Steffani based on a 'modern' literary source – Ariosto's romantic epic, Orlando furioso ... It is a psychological drama, set in a quasi-fairy-tale world that allows librettist and composer to concentrate on the emotions, relationships, and development of the characters involved."
John Denison Champlin; William Foster Apthorp, eds. (1899). "Orlando Generoso". Cyclopedia of Music and Musicians. Vol. 3. New York: C. Scribner's Sons.