Moum, Truls; Arnason, Ulfur; Árnason, Einar (2002). «Mitochondrial DNA sequence evolution and phylogeny of the Atlantic Alcidae, including the extinct Great Auk (Pinguinus impennis)». Molecular Biology and Evolution (Oxford: Oxford University Press) 19 (9): 1434–1439. PMID12200471. doi:10.1093/oxfordjournals.molbev.a004206.
Friesen, V.L.; Baker, A.J.; Piatt, J.F. (1996). «Phylogenetic relationships within the Alcidae (Charadriiformes: Aves) inferred using total molecular evidence». Molecular Biology and Evolution13 (2): 359–367. PMID8587501. doi:10.1093/oxfordjournals.molbev.a025595.
Moum, Truls; Arnason, Ulfur; Árnason, Einar (2002). «Mitochondrial DNA sequence evolution and phylogeny of the Atlantic Alcidae, including the extinct Great Auk (Pinguinus impennis)». Molecular Biology and Evolution (Oxford: Oxford University Press) 19 (9): 1434–1439. PMID12200471. doi:10.1093/oxfordjournals.molbev.a004206.
Friesen, V.L.; Baker, A.J.; Piatt, J.F. (1996). «Phylogenetic relationships within the Alcidae (Charadriiformes: Aves) inferred using total molecular evidence». Molecular Biology and Evolution13 (2): 359–367. PMID8587501. doi:10.1093/oxfordjournals.molbev.a025595.
Gill, Frank; Donsker, David; Rasmussen, Pamela, red. (July 2021). «Noddies, gulls, terns, skimmers, skuas, auks». IOC World Bird List Version 12.1. International Ornithologists' Union. Henta 21. august 2022.