著者名,論文名,雑誌名,ISSN,出版者名,出版日付,巻,号,ページ,URL,URL(DOI) O'KEEFE F. R.,"Evolution and homology of the astragalus in early amniotes : new fossils, new perspectives",Journal of Morphology,,,2006,267,,415-425,https://cir.nii.ac.jp/crid/1570572700779728128,