1. AOU, 1983. Check-list of North American birds, sixth ed. American Ornithologists’ Union, Washington, DC.
2. AOU, 1998. Check-list of North American birds, seventh ed. American Ornithologists’ Union, Washington, DC.
3. The social system of the Green Jay in Colombia;Alvarez;Living Bird,1975
4. The genera of Corvidae and their relationships;Amadon;Am. Mus. Nov.,1944
5. Breeding patterns and habitat use in the endemic Curl-crested Jay of central Brazil;Amaral;J. Field Ornithol.,2003