Reference
Ingo Hahn (2007): Biogeographical Isolation and Bioacoustics: the Juan Fernandez Firecrown, Sephanoides fernandensis (Aves: Trochilidae) (King, 1831), of Robinson Crusoe Island, Chile – Bonn zoological Bulletin - früher Bonner Zoologische Beiträge. – 55: 101 - 103.