Search result for "Mancinelli", Metropolitan Opera Archives. Retrieved 11 September 2020. (Direct link to page not available: use of "key word search" facility from site front page brings up the required information.)
Search result for "Falstaff", Metropolitan Opera Archives. Retrieved 11 September 2020
oxfordmusiconline.com
Libby, Dennis, and Julian Budden. "Mancinelli, Luigi", Grove Music Online, Oxford University Press, 2001. Retrieved 11 September 2020 (subscription required)