Mehlum F., Gjessing Y., Haftorn S., and Bech C. “Census of Breeding Antarctic Petrels Thalassoica Antarctica and Physical Features of the Breeding Colony at Svarthamaren, Dronning Maud Land, With Notes on Breeding Snow Petrels Pagodroma Nivea and South Polar Skuas Catharacta Maccormicki”. Polar Research, vol. 6, no. 1, Jan. 1988, pp. 1-9, doi:10.3402/polar.v6i1.6841.