A survey of French source for the staging of Verdi's Operas : "Livrets de mise en scène", annotated scores and annotated libretti in two Parisian collections
H. Robert Cohen, A survey of French source for the staging of Verdi's Operas : "Livrets de mise en scène", annotated scores and annotated libretti in two Parisian collections, Studi verdiani (Testo stampato) , 3, 1985, pp. 11-44