Leo Joseph, Alicia Toon, Erin E. Schirtzinger, Timothy F. Wright & Richard Schodde (2012). A revised nomenclature and classification for family-group taxa of parrots (Psittaciformes). Zootaxa 3205: 26–40 DOI: 10.11646/zootaxa.3205.1.2
D. W. Winkler, S. M. Billerman und I. J. Lovette (2020). New World and African Parrots (Psittacidae). version 1.0. In Birds of the World (S. M. Billerman, B. K. Keeney, P. G. Rodewald, and T. S. Schulenberg, Editors). Cornell Lab of Ornithology, Ithaca, NY, USA. doi: 10.2173/bow.psitta3.01
Kaiya L. Provost, Leo Joseph & Brian Tilston Smith: Resolving a phylogenetic hypothesis for parrots: implications from systematics to conservation. Emu - Austral Ornithology, Volume 118, 2018 - Issue 1: Special Issue: Recent Advances in the Evolution and Conservation of Parrots. doi: 10.1080/01584197.2017.1387030