<La sonnambula>

<La sonnambula>

Annals of opera, 1597–1940

<La sonnambula>

Opernlexikon/Opera catalogue/Lexique des opéras/Dizionario operistico

<La sonnambula>

A dictionary of music and musicians (A.D. 1450–1880)

George Grove

<La sonnambula>

Algemene muziek encyclopedie