Hackett, Shannon J.; Kimball, Rebecca T.; Reddy, Sushma; Bowie, Rauri C. K.; Braun, Edward L.; Braun, Michael J.; Chojnowski, Jena L.; Cox, W. Andrew; Han, Kin-Lan; Harshman, John; Huddleston, Christopher J.; Marks, Ben D.; Miglia, Kathleen J.; Moore, William S.; Sheldon, Frederick H.; Steadman, David W.; Witt, Christopher C.; Yuri, Tamaki (2008). „A Phylogenomic Study of Birds Reveals Their Evolutionary History”. Science. 320 (5884): 1763—1768. PMID18583609. doi:10.1126/science.1157704.
Prum, R.O.; Berv, J.S.; Dornburg, A.; Field, D.J.; Townsend, J.P.; Lemmon, E.M.; Lemmon, A.R. (2015). „A comprehensive phylogeny of birds (Aves) using targeted next-generation DNA sequencing”. Nature. 526: 569—573. doi:10.1038/nature15697.
Claramunt, Santiago; Cracraft, Joel (2015). „A new time tree reveals Earth history’s imprint on the evolution of modern birds”. Science Advances. 1 (11): e1501005. doi:10.1126/sciadv.1501005.
"CMC 152", a distalcarpometacarpus; more similar to extant barbets than to Capitonides: Ballmann, Peter. „Les Oiseaux miocènes de la Grive–Saint–Alban (Isère)” [The Miocene birds of Grive-Saint-Alban (Isère)]. Geobios (на језику: француски и енглески). 2: 157—204. doi:10.1016/S0016-6995(69)80005-7.
nih.gov
ncbi.nlm.nih.gov
Hackett, Shannon J.; Kimball, Rebecca T.; Reddy, Sushma; Bowie, Rauri C. K.; Braun, Edward L.; Braun, Michael J.; Chojnowski, Jena L.; Cox, W. Andrew; Han, Kin-Lan; Harshman, John; Huddleston, Christopher J.; Marks, Ben D.; Miglia, Kathleen J.; Moore, William S.; Sheldon, Frederick H.; Steadman, David W.; Witt, Christopher C.; Yuri, Tamaki (2008). „A Phylogenomic Study of Birds Reveals Their Evolutionary History”. Science. 320 (5884): 1763—1768. PMID18583609. doi:10.1126/science.1157704.