Craig Robson, Family Paradoxornithidae (Parrotbill), in Josep del Hoyo, Andrew Elliott, David Christie (a cura di), Handbook of the birds of the world, 12: Picathartes to Tits and Chickadees, Lynx Edicions, 2007, pp. 292-320, ISBN8487334105, OCLC861071869. URL consultato il 17 settembre 2019.