A functional and evolutionary analysis of rhynchokinesis in birdsDOI: info:10.5479/si.00810282.395Smithsonian Institution Press40
Zusi, Richard L. 1984. A functional and evolutionary analysis of rhynchokinesis in birds. Washington: Smithsonian Institution Press. In Smithsonian Contributions to Zoology, 395. https://doi.org/10.5479/si.00810282.395.