Kennedy, Martyn; Spencer, Hamish G (2004). "Phylogenies of the frigatebirds (Fregatidae) and tropicbirds (Phaethonidae), two divergent groups of the traditional order Pelecaniformes, inferred from mitochondrial DNA sequences". Molecular Phylogenetics and Evolution. 31 (1): 31–38. Bibcode:2004MolPE..31...31K. doi:10.1016/j.ympev.2003.07.007. PMID15019606.
harvard.edu
ui.adsabs.harvard.edu
Kennedy, Martyn; Spencer, Hamish G (2004). "Phylogenies of the frigatebirds (Fregatidae) and tropicbirds (Phaethonidae), two divergent groups of the traditional order Pelecaniformes, inferred from mitochondrial DNA sequences". Molecular Phylogenetics and Evolution. 31 (1): 31–38. Bibcode:2004MolPE..31...31K. doi:10.1016/j.ympev.2003.07.007. PMID15019606.
hbw.com
Orta, J; Garcia, EFJ; Kirwan, GM; Boesman, P. "Christmas Frigatebird (Fregata andrewsi)". In del Hoyo, J; Elliott, A; Sargatal, J; Christie, DA; de Juana, E (eds.). Handbook of the Birds of the World Alive. Barcelona: Lynx Edicions. Retrieved 30 November 2014.(subscription required)
Kennedy, Martyn; Spencer, Hamish G (2004). "Phylogenies of the frigatebirds (Fregatidae) and tropicbirds (Phaethonidae), two divergent groups of the traditional order Pelecaniformes, inferred from mitochondrial DNA sequences". Molecular Phylogenetics and Evolution. 31 (1): 31–38. Bibcode:2004MolPE..31...31K. doi:10.1016/j.ympev.2003.07.007. PMID15019606.
