Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) MIURA Michihiro and KAMEO Koji,Morphological change of a calcareous nannofossil genus Sphenolithus during Eocene–Miocene,Annual Meeting of the Geological Society of Japan,1348-3935,The Geological Society of Japan,2021,2021,0,303,https://cir.nii.ac.jp/crid/1390573715168672640,https://doi.org/10.14863/geosocabst.2021.0_303