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web.archive.org
Shapiro, Beth; Sibthorpe, Dean; Rambaut, Andrew; Austin, Jeremy; Wragg, Graham M.; Bininda-Emonds, Olaf R. P.; Lee, Patricia L. M.; Cooper, Alan (2002). "Flight of the Dodo". Science 295 (5560): 1683. doi:10.1126/science.295.5560.1683. PMID 11872833. Supplementary information
Lee R. Hagey et al; Biliary bile acids of fruit pigeons and doves(Columbiformes); Journal of Lipid Research; PDF online[неработеща препратка], last checked 2010-01-31