Analysis, and Performance Practice, Chicago and London: University of Chicago Press. Schmidgall, Gary (1985), "Verdi's King Lear Project", 19th-Century Music, Vol. 9, No. 2, pp. 83–101 Springer, Christian (2005), "Re Lear - Shakespeare bei Verdi" in Verdi-Studien, Praesens Verlag . Werfel, Franz; Stefan, Paul (Ed. & selected; trans. Edward Downes) (1973), Verdi: The Man and His Letters, New York: Vienna House. Opera libretti Operas based on King Lear Giuseppe Verdi Unfinished operas