(2008) “A Multilocus Molecular Phylogeny of the Parrots (Psittaciformes): Support for a Gondwanan Origin during the Cretaceous”, Molecular Biology and Evolution25 (10), p. 2141–2156. doi:10.1093/molbev/msn160.
(2006) “Phylogenetic relationships and historical biogeography of neotropical parrots (Psittaciformes: Psittacidae: Arini) inferred from mitochondrial and nuclear DNA sequences”, Systematic Biology55 (3), p. 454–470. doi:10.1080/10635150600697390.
Stidham, T. (1998). “A lower jaw from a Cretaceous parrot”, Nature396 (6706), p. 29–30. doi:10.1038/23841.
Waterhouse, D. M. (2006). “Parrots in a nutshell: The fossil record of Psittaciformes (Aves)”, Historical Biology18 (2), p. 227–238. doi:10.1080/08912960600641224.
(2011) “Stem Parrots (Aves, Halcyornithidae) from the Green River Formation and a Combined Phylogeny of Pan-Psittaciformes”, Journal of Paleontology85 (5), p. 835–852. doi:10.1666/10-108.1.
Suh A, Paus M, Kiefmann M (2011). “Mesozoic retroposons reveal parrots as the closest living relatives of passerine birds”, Nature Communications2 (8), p. 443–8. doi:10.1038/ncomms1448. Bibkodo:2011NatCo...2E.443S.
(2000) “A new psittaciform bird from the London clay (Lower Eocene) of England”, Palaeontology43 (2), p. 271–285. doi:10.1111/1475-4983.00126.
(2011) “Stem Parrots (Aves, Halcyornithidae) from the Green River Formation and a Combined Phylogeny of Pan-Psittaciformes”, Journal of Paleontology85 (5), p. 835–852. doi:10.1666/10-108.1.
Mayr, Gerald (2011). “Well-preserved new skeleton of the Middle Eocene Messelastursubstantiates sister group relationship between Messelasturidae and Halcyornithidae (Aves, ?Pan-Psittaciformes)”, Journal of Systematic Palaeontology9, p. 159–171. doi:10.1080/14772019.2010.505252.
(2005) “The evolution of the spindlin gene in birds: Sequence analysis of an intron of the spindlin W and Z gene reveals four major divisions of the Psittaciformes”, Molecular Phylogenetics and Evolution36 (3), p. 706–721. doi:10.1016/j.ympev.2005.03.013.
(2007) “Evolution of craniofacial novelty in parrots through developmental modularity and heterochrony”, Evolution and Development9 (6), p. 590–601. doi:10.1111/j.1525-142X.2007.00199.x.
(2011) “Molecular systematics of two enigmatic genera Psittacella and Pezoporus illuminate the ecological radiation of Australo-Papuan parrots (Aves: Psittaciformes)”, Molecular Phylogenetics and Evolution59 (3), p. 675–684. doi:10.1016/j.ympev.2011.03.017.
(2009) “The evolutionary diversification of parrots supports a taxon pulse model with multiple trans-oceanic dispersal events and local radiations”, Molecular Phylogenetics and Evolution54 (3), p. 984–94. doi:10.1016/j.ympev.2009.08.021.
Suh A, Paus M, Kiefmann M (2011). “Mesozoic retroposons reveal parrots as the closest living relatives of passerine birds”, Nature Communications2 (8), p. 443–8. doi:10.1038/ncomms1448. Bibkodo:2011NatCo...2E.443S.