Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Gerold Wefer and Wolfgang H. Berger,Isotope paleontology: growth and composition of extant calcareous species,Marine Geology,0025-3227,Elsevier BV,1991-09,100,1-4,207-248,https://cir.nii.ac.jp/crid/1363670318343970304,https://doi.org/10.1016/0025-3227(91)90234-u