"Part 7- Vertebrates". Collection of genus-group names in a systematic arrangement. Archived from the original on 5 October 2016. Retrieved 30 June 2016.
"Part 7- Vertebrates". Collection of genus-group names in a systematic arrangement. Archived from the original on 5 October 2016. Retrieved 30 June 2016.
worldcat.org
Campagna, Leonardo; McCracken, Kevin G.; Lovette, Irby J. (September 2019). "Gradual evolution towards flightlessness in steamer ducks*". Evolution. 73 (9): 1916–1926. doi:10.1111/evo.13758. ISSN0014-3820. PMID31106403.