Classical Music Archives: Nicolai: Music files offered in MIDI, and MP3 audio formats, including live recordings of featured artists.
Nicolai, Carl Otto Ehrenfried: Grove Concise Dictionary of Music entry from WQXR radio in New York.
Otto Nicolai: Filmography at IMDb with movies crediting his compositions.
Otto Nicolai: Brief biographical sketch, comments on his operatic writing, and Naxos discography.