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) George Helffrich and Satoshi Kaneshima,Outer-core compositional stratification from observed core wave speed profiles,Nature,0028-0836,Springer Science and Business Media LLC,2010-12,468,7325,807-810,https://cir.nii.ac.jp/crid/1362825894515912704,https://doi.org/10.1038/nature09636