Tham khảo Á điểu

  • Dữ liệu liên quan tới Á điểu tại Wikispecies
  • Wang, Min; Zhou, Zhong-He; O'Connor, Jingmai K.; Zelenkov, Nikita V. (2014). "A new diverse enantiornithine family (Bohaiornithidae fam. nov.) from the Lower Cretaceous of China with information from two new species" (PDF). Vertebrata PalAsiatica. 52 (1): 31–76.
  • Chiappe, Luis M.; Walker, Cyril A. (2002). "Skeletal Morphology and Systematics of the Cretaceous Euenantiornithes (Ornithothoraces: Enantiornithes)". In Chiappe, Luis M.; Witmer, Lawrence M. Mesozoic Birds: Above the Heads of Dinosaurs. University of California Press. pp. 240–67. ISBN 978-0-520-20094-4.
  • You, K.J. Dodson; Lamanna, H.-L.; Harris, M.C.; Chiappe, J.D.; O'Connor, L.M.; Ji, J.K.; Lu, S.-A.; Yuan, J.-C.; Li, C.-X.; Zhang, D.-G.; Lacovara, X.; Ji, Q. (2006). "A Nearly Modern Amphibious Bird from the Early Cretaceous of Northwestern China". Science. 312 (5780): 1640–1643.

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