Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Kawamura Kiichiro and Ikehara Ken and Fujioka Kantaro,Abrupt change of sedimentary environment in ca. 7300 years ago recorded in the piston cores from the central Okinawa Trough floor,The Journal of the Geological Society of Japan,00167630,The Geological Society of Japan,2007,113,5,184-192,https://cir.nii.ac.jp/crid/1390282681213510656,https://doi.org/10.5575/geosoc.113.184