Feathered Dinosaurs and the Origin of Flight: The Dinosaur Museum Journal 1. Blanding: The Dinosaur Museum. 2002: 16–26. 外部链接存在于|chapter= (帮助) Czerkas, S.A
(Ed.). Feathered Dinosaurs and the Origin of Flight. The Dinosaur Museum:Blanding, Utah, 15-41. ISBN 978-1-932075-01-4. Alleyne, Richard. Pterodactyls were