(en) F. Keith Barker, Kevin J. Burns, John Klicka, Scott M. Lanyon et Irby J. Lovette, « Going to extremes: contrasting rates of diversification in a recent radiation of new world passerine birds », Systematic Biology, OUP, vol. 62, no 2, , p. 298-320 (ISSN1063-5157 et 1076-836X, OCLC34872116, PMID23229025, DOI10.1093/SYSBIO/SYS094, lire en ligne)