The New Grove Dictionary of Opera, Macmillan, 1996
Información encontrada
(Madama Butterfly, tragedia giapponese, 2 acts; libretto, Illica and Giacosa, after D. Belasco's stage version of a magazine story by J.L. Long; Brescia, Grande, 28 May 1904; 2nd version, 2cts; 3rd version, 2 acts; London, Covent Garden, 10 July 1905; 4th version, 3 acts; Paris, OC (Feydeau), 28 Dec. 1906)