鳥類の起源
Retrieved 2006-09-30.
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Mayr, Gerald; Pohl, B.; Peters, D. S. (2005). “A Well-Preserved Archaeopteryx Specimen with Theropod Features”. Science 310 (5753): 1483–1486. Bibcode: 2005Sci...310.1483M. doi:10.1126/science.1120331. PMID 16322455.
Olson, Storrs L. (1985): The fossil record of birds. In: Farner, D.S.; King, J.R. & Parkes, Kenneth C. (eds.): Avian Biology 8: 79-238. Academic Press, New York.