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) Dmitry A. Ruban,Silurian biotic crises in the northern Greater Caucasus (Russia): a comparison with the global record,Paleontological Research,1342-8144,The Paleontological Society of Japan,2008-12,12,4,387-395,https://cir.nii.ac.jp/crid/1360284923839389952,https://doi.org/10.2517/prpsj.12.387