Ehrlich, Paul R.; Dobkin, David, S.; Wheye, Darryl (1988). The Birders Handbook (First ed.). New York, NY: Simon & Schuster. pp. 29–31. ISBN0-671-65989-8.{{cite book}}: CS1 maint: multiple names: authors list (link)
Mayr, Ernst; Cottrell, G. William, eds. (1979). Check-List of Birds of the World. Vol. 1 (2nd ed.). Cambridge, Massachusetts: Museum of Comparative Zoology. p. 59 – via Biodiversity Heritage Library.
de Bruyn, P. J. N.; Cooper, J. (2005). "Who's the boss? Giant petrel arrival times and interspecific interactions at a seal carcass at sub-Antarctic Marion Island". Polar Biology. 28 (7): 571–573. doi:10.1007/s00300-005-0724-7. S2CID43648629.
de Bruyn, P. J. N.; Cooper, J. (2005). "Who's the boss? Giant petrel arrival times and interspecific interactions at a seal carcass at sub-Antarctic Marion Island". Polar Biology. 28 (7): 571–573. doi:10.1007/s00300-005-0724-7. S2CID43648629.