Société Cuvierienne; Cuvierienne, Société (1839). Revue zoologique. Vol. 2. Paris: Société cuvierienne.
Cottrell, G. William; Greenway, James C.; Mayr, Ernst; Paynter, Raymond A.; Peters, James Lee; Traylor, Melvin A.; University, Harvard (1945). Check-list of birds of the world. Vol. 5. Cambridge: Harvard University Press.
Clayton, Dale H.; Cotgreave, Peter (1994). "Relationship of bill morphology to grooming behaviour in birds". Animal Behaviour. 47 (1): 195–201. doi:10.1006/anbe.1994.1022. S2CID53184717.
Clayton, Dale H.; Cotgreave, Peter (1994). "Relationship of bill morphology to grooming behaviour in birds". Animal Behaviour. 47 (1): 195–201. doi:10.1006/anbe.1994.1022. S2CID53184717.